Question Regarding Leveling

Hello all, I want to level a paladin but I had a few questions first.
My endgame goal is to heal so I was wondering is it possible to level to 60 holy? Will killing stuff take an extremely long amount of time etc?
Also if I have to level ret, is it possible to heal all the instances up until 60 as ret?
Any response is appreciated
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My endgame goal is to heal so I was wondering is it possible to level to 60 holy? Will killing stuff take an extremely long amount of time etc?
Also if I have to level ret, is it possible to heal all the instances up until 60 as ret?
Any response is appreciated
