The grind isn't too bad there are alot of quests but you will level alot faster in abyss compared to doing quests/repeats etc.
Abyss can be a bit overwhelming if you solo so it's much better to find a guild and goto abyss with them incase you run into pkers.
As for reaching max in 10 days.. i guess it's possible but you really need to know the game decently well and where to level.
But yeah having an active helpful guild will help greatly seeing they can mentor you (Mentoring allows them to kill high level mobs and letting you get all the exp).