If it’s your first I strongly recommend Guardian due the simplicity of the class, this does not mean it’s lackluster at all. Guardians have very high survivability through blocks, reflects and blinds (active defenses), you’ll be using a lot of symbols that will boost you and your teammates and damage your foes. If you’re into the Paladin gameplay (heavy armor, light magic to protect yourself and damage others) Guardian is your class.
Revenant is a class that channels legends (references to GW1 lore) to asume different fighting styles. They act as a constant boon provider to their party and have some really cool looking skills. Unfortunately, they have been recently underlooked and some of their most powerful mechanics were redesigned or changed, some people refer to them as Nerfenants. The playstyle can be somehow a bit more challenging to master than a Guardian for having good rotations.
Engineers are the jack of all trades of the game, they can’t weapon swap but they use kits to compensate this, kits will give you a whole set of new abilities. They’re a strong class for all around content but are hard to master if you want to have optimal rotations and damage output. They rely somewhat on random effects of some skills but are not as chaotic as Mesmers.
TLDR; Guardian if it’s your first time around GW2 to get used to mechanics and the game, beginner-friendly class. Engineer if you’re up to a challenge and are willing to invest some good time reading forums, watching vids and learning. Revenant if you want to complain at some point (but you’re gonna look really cool!)
Note: Remember you have 5 character slots if you bought the game and 2 if you’re in F2P so you can try them all, even in F2P you can erase one to make another.
