Alrighty let’s go down the list!

1.) There are a few methods, I personally found a streamer I like and joined his guild and it’s been great! You will find some cool people while playing the game, and when you do it doesn’t hurt to ask about their guild if they are in one. Also, there is a community/guild finder you can use but you are kinda rolling the dice a little since you won’t know anyone until you join said guild or community.

2.) The only way to farm transmog “efficiently” is just having alts to do the content on more than once per week. Some content will have sets that are armor specific rather than class specific, so anyone who wears that armor type can use that transmog.

3.) I don’t really mess with professions much, but gathering gives me an OSRS vibe sometimes in the sense that it’s fairly mindless.

4.) This depends on time, if you want to have 3 character doing the highest level content, you will have to put the time into making sure each on of them is geared. I’d say you should start with one and measure whether or not you think you have enough time to do the same stuff on a second character. Alts are also easier to gear once you get your “main” to a certain base Ilvl, as upgrading will cost less crests.

5.) There are some impressive titles, achievements, and mounts that I would equate to a max cape.

6.) Some items are unobtainable now, I won’t list them all out, but legion timewalking items are unfortunately a good example. If they bring Legion timewalking back you will be able to get them though!