What are you interested in doing while online?
There are guilds and communities for most of the content.
One of the easier ways is probably through rp, then i suggest you play on argent dawn server.
Or check out the sticky thread here on general forum where people post to find in game friends.
https://eu.forums.blizzard.com/en/wow/t/post-if-you-want-to-make-some-in-game-friends-pt3/
Or do what i do sometimes. Go to the zoo in mulgore, alot of fun there and world class steakes. Just don’t go too close as they tend to fart alot.