Welcome to Azeroth. Hope you’re having fun so far
N…nooo, not exactly, since you don’t really need groups to quest anymore.
We are on the 8th expansion now, Shadowlands. So a new character would have nine complete “games” to play through. More like 10, since the original contains two separate continents.
Making people play through ALL of that to get to the current content would be excessive, so the idea of Chromie Time is that you can choose any ONE of the expansions to play, and that will give you enough experience (XP) to get to Level 50, at which point you can join in the latest expansion Shadowlands.
That idea, stated in that way, still makes a lot of sense to me. Unfortunately, we also have scaling, and Chromie Jail for newcomers, so that the only expansion after 30 that newcomers can get Chromie Time for is BfA.
HOWEVER, as far as I know, you can still also “hopscotch” your way theough the expansions, doing a little in each.
So if you go upstairs in the Mage Tower in Stormwind, one of the portals should bring you to Outland, where I think you will also see mobs and quests at level 35 while you are 35, but I don’t think they will get any higher.
And when you want to move on from there, you can go to Stormwind and get the ship from the pier in Stormwind Harbour to Valliance Keep in Borean Tundra, which I think will scale from 35-40.
BfA is what the devs intend for new players, but it does have its downsides, so if you would like to do a bit of exploring, you can try these out!
BTW, I see you are on my main realm, so if you need any help of any kind, please post here or in the New Players forum https://eu.forums.blizzard.com/en/wow/c/guides/new-returning-player-questions-guides/236 and I’ll be happy to help out.
Standard info pack for new players:
You want to bookmark
www.wowhead.com to look up quests, locations, items
www.icy-veins.com to learn about building and playing your class
and this HUGE video is broken down into ~30 second chapters you can consult about almost anything you might need to know, except Chromie Time, because it was released just before Chromie Time was introduced: