Welcome to the forum!
Is it easy....yep. 15min tops (thats with double checking myself).
Tools....I got mine from Jim at Northland Shooters Supply, hes one of our sponsors and is great to deal with. He has tools, barrels and the like.
Several sponsors here have barrels that are very reasonable. Actually right now Dennis from accurate barrels has a steal going on till Dec 31. 299 for barrel, nut, and lug on in stock merchandise.
Those cartridges will fit your bolt face. You have a long action, I personally would stay with a LA cartridge.
Good luck!
Scooter