I would definitely recommend binging James Hoffmann’s YouTube channel or getting his book on home coffee as he does a very good job of breaking things down in a way that is detailed but approachable. It’s a great jumping on point.

Pick one or two inexpensive brewing methods to try first and try coffees from different roasters and different origins and processes and roast levels to figure out what you like.

You don’t have to drink coffee black if you don’t want to, but it’s a good idea to at least try coffees black first (let them cool down a bit too) before you add milk. Light and medium roast coffees that are good quality and brewed well can be sweet and fruity with little bitterness and should taste good on their own. You may still end up preferring to take it with milk, though, and that’s fine!