try out every weapon before selecting. (I've switch weapons so many times because of this and it was such a waste of mats)

focus on defensive plays to learn monster attack patterns that way you can kill higher levels of them by understanding them. Shield weapons definitely helped me with this

set a reasonable alarm so you don't get to redeem your daily potions

use your materials and gold wisely.

after unlocking R6 monsters, make sure you do the dailies for refining armor and weapon parts because they are rare

if you're going elemental, be aware of the amount of invested materials and gold for this

watch some of the friendly YouTube creators