Was actually in your shoes when I first came to GW2 back in beta. Was a huge WoW player (still jump on it occasionally), and was trying to transition to GW2 from that.
Easy path? Warrior is easy sure, so is Ranger. Ranger plays almost like the Hunter, without all the pet taunts (at least until higher levels) and such. But otherwise, it’s very comfortable and easy to work with to get a first hand experience. If you want to be in the front lines though, Warrior is the way to go. Simple hack and slash game play.
Stay away from Engineers and Mesmers mostly though, till you got a bit more experience. They seem to be the most complex class to do well with. Elementalist was actually easy for me as well, as it just felt like a typical glass cannon spell caster. Necromancers will fill your Warlock hole if you were a fan of Demonology, as they can summon all kinds of minions. You’ll actually find them more fun than Warlocks. I’m personally a Well/condition spreader type.
One thing I will mention, throw mostly everything you know of WoW type game play out the window. When it comes to “questing”, you won’t be doing anything like what you did in WoW. There is no quest hubs with tons of quests to pick up. Everything is dynamic events with little “helping hand” type quests here and there.
It’s going to feel weird, yeah. But give it time. It takes some getting used to. You’re gonna want to quit cause it takes you from your comfort zone pretty quick, but don’t. Stick with it, and it will grow on you. Just have an open mind is all.