OKAY, so you should be undead palaadan. it makes good invinsible power at level 3 and you also dual RPG at 14. i no you wanted to know before that level but its a good perk after. DO THAT ONE
Prot warrior is pretty easy to level just with dungeons. IM doing it myself right now. Stopped briefly at 29 to pvp then went from 29-49 in 3 days. Maybe 12-14 hours of actual play time. im at just over 2 days of total play time and at 49. I could have gone faster but i stopped to pvp for a bit and to work on my trade and secondary skills. Im a human warrior for the rep gain increase and the bonus to swords and maces. If your horde i would got tauren for the warstomp and 5% hp increase.