No.
At least they weren't to me back in the day. MC was close, but in T5 you couldn't handle AQ20 or ZG in a 5+ man group without knowing the mechanics and of course it'll depend on the class.
Basically if you don't know what you're doing expect to "progress" on soloing the raid and often you might need one other player.
For the most part raids weren't soloable until WotLK, at which point you could easily do classic raids with a level 80 in Naxx gear and even some BC stuff.
To the OP, if you'd like to level faster I'd suggest you download a leveling addon. It'll just point you to each quest hub you need to go to to level up the fastest, more often than not you'll be aiming for green quests instead of red ones since you can level faster that way. Also I'd suggest getting the Verdigan's Fist quest weapon since it's not too difficult to grab and will give you a strong weapon for a while.