This is a step by step tutorial for how to craft the new cool items and find the ores 

Step 1 

How to find the ores (you have to smelt ores marked in yellow)

Mining  (over world around diamond level) : uranium titanium, amazonite, alexandrite, amber, amethist, ametrine, aquamarine, tourmaline, citrine, chrysolite, flourite, garnet, indigolite, iolite, jade, Jasper, kunzite, malachite, opal, peridot, prism, Ruby, Sapphire, sardonyx, spinel, sugilite, tanzanite, titanium, topaz, onyx, chloronium, rose quartz, turquoise, iridium, fluorite, rutile, amolite, azurite, smoky quartz, peacock ore, peacock topaz, Tanzanite (rare version), vesuvianite, (rare) sapphire, sunset jasper, hackmantite, goshenite, tin, bronze, silver, nickel, zinc, quicksilver, aluminium and platinum

Exploring the end: enderium, moonstone, obsidian nuggets, cobalt and pearl 

Exploring the nether: fire opal (nether waste and crimson forest), catseye (warped forest) green catseye (warped forest), ghoul quartz (soul sand valley) and soul quartz (soul sand valley) 

Trading (exclusive for trading with wandering trader): adamantite, mythril and crystal 

Crafting: obsidian nuggets, plutonium, unoptanium and nether gold 

Smelting: smelt iron to get steel

Loot for killing ender dragon: dragon scales  

Fusing: you can fuse gemstones together in a brewing stand but make sure that you only put one gem in each slot of the bottom row otherwise you waste a bunch of them

Fusing recipes (not all based on real life):

citrine + amethyst = ametrine 

amethyst + citrine = ametrine

uranium + adamantite = plutonium 

adamantite + uranium = plutonium 

titanium + mythril = unoptanium

mythril + titanium = unoptanium

sapphire + ruby = azurite 

ruby + sapphire = azurite 

spinel + amethyst = flourite

amethyst + spinel = flourite 

kunzite + amazonite = alexandrite 

amazonite + kunzite = alexandrite 

peridot + jade = malachite

jade + peridot = malachite 

turquoise + flourite = fluorite

flourite + turquoise = fluorite 

sapphire + kunzite = peacock ore 

kunzite + sapphire = peacock ore 

tanzanite + peridot = rare tanzanite

peridot + tanzanite = rare tanzanite 

wither rose + steel = withered steel 

ruby + emerald = sunset jasper 

emerald + ruby = sunset jasper 

catseye + uranium = adamantite 

soul quartz + titanium = mythril

coal + iron ingot = steel 

charcoal + iron ingot = steel 

amethyst + emerald = vesuvianite

emerald + amethyst = vesuvianite 

citrine + sapphire = rare sapphire

sapphire + citrine = rare sapphire 

redstone + green catseye = red catseye 

amethyst + green catseye = purple catseye 

aquamarine + green catseye = blue catseye 

end crystal + amethyst shard = crystal

Thats how to get the ores 

Step 2 weapons 

For nearly every ore you can make a sword with an exception off obsidian nuggets you can also craft swords now from emerald and lapis but it all works a bit differently:

If you want to make a sword or axe (you can't make an axe with mythril, adamantite, obsidian nuggets, plutonium and unoptanium)

You first need a item called obsidian nuggets there are 2 ways to get obsidian nuggets 

1. Put obsidian in a crafting table
2. Find obsidian ore in the new end dimension

Now put these obsidian nuggets in a vertical line from bottom left to up right in the crafting table and you get obsidian sticks 

 you can make a sword or axe of any gem now with the regular minecraft sword recipe except instead of a normal stick you use a obsidian stick. 

There are a few exceptions because metals have a different recipe instead of using obsidian nuggets to make a obsidian stick you use iron nuggets to make a iron stick 

You can know when something is a metal when it has the same shape as iron 

If an ore is found in the nether you need blaze rods to craft a sword or axe out of it (except for green catseye)

These are some extra powerfull swords:

The uranium and titanium sword: you craft it by doing uranium up top titanium in the middle and a iron stick at the bottom 

You can go a step further by trading with a wandering trader for adamantite and mythril 

Or get adamantite and mythril from fusing:

catseye + uranium = adamantite and 

soul quartz + titanium = mythril

 and with those you can make the adamantite and mythril blade mythril up top adamantite at the middle and a iron stick at the bottom 

You can go even further but I will not spoil how to make the strongest weapons in the game you have to find that out yourself. 

Step 3 armor 

You can't make armor from every ore 

but here is a list of witch ores you can: cobalt, moonstone, amethist, Ruby, peridot, spinel, topaz, chrysolite, ametrine, tanzanite, indigolite, aquamarine, platinum, garnet, tourmaline, citrine, flourite, opal, jade, (rare) tanzanite, sardonyx, sapphire, sugillite, peacock topaz, ammolite, azurite, fluorite, prism, (rare) sapphire, alexandrite and malachite 

You just craft armor like normally in minecraft. 

This was the tutorial if you still don't know how to craft something or forget you can always look in the recipe book. 

Some more new things the addon adds: 

New trees that grow in the end. 

And better wandering trader trades