Need some advice

I just started playing this game a couple days ago and I’m still a little confused about since things. Should I go through all the levels on easy and then do em over on harder levels or what. I’m a lvl 31 rogue on floor 28, any other advice on what to do would help because I’m just killing things lol.

If you feel like easy to easy then try it on a harder level. Higher floor = new items unlock.
I prefer you grinding out your floors until your level level 99 then you can start thinking about farming. Save up your crystals /mythstone since they’ll come in handy once you start enchanting and progress through the higher levels floors. Keep red legend items to convert into rare+ crystals since this is the best way to get crystals.