1-30:
Early focus solely on the main quest and ignore all the side quests. You don't want to spend so much time on side quests that you lose sight of the main objective, but you also don't want to rush through the game without enjoying all it has to offer.
It is also needed to unlock the heart rune, this is your ultimate ability, and will stack up as you do damage, healing or take damage. Offensive and defensive.
Get to level 10 by the main story, discover the town. Firstly craft your weapons,
30-40
40-50
Recommended leveling setups: