No clue what I’m doing

As you’ve read the title. I have no clue how to build “classes” or lean towards a certain build.

I have literally been choosing item that make my health, defense if and when possible my attack(whenever that happens)

I seem to have a lot of items, I still have no clue where the best place/maps are for farming certain materials for upgrading.

Oh btw I’m lvl 56.

Help?