[2023] Idk how to move on

What is "cap 3"?

What is "2 necro"?

The area level is listed in the top right corner, are you playing in areas that are the right level for you? If it's too hard, you can go to an easier area and level up.

Are you putting points into your skill trees?

Have you unlocked a mastery class yet?

I see in the one screenshot you posted that you are level 21. That is still very early in the game and numbers will go up a lot. If you're struggling this early, take it slow and be patient. It will take some time to advance.

You can have more than one character at a time. Characters can be respecialised if you make a mistake. You don't need to delete old ones and start over.

Crafting is simple and powerful. You will find plenty of crafting resources. Start early and craft often.

Given your history playing D2 and PoE, I can understand why you would be restarting characters so frequently. In Last Epoch, the only permanent decisions are your class selections. Respecing is cheap and easy. I advise that you at least finish the campaign before restarting again.

No, that's a class selection. You can change anything other than a class selection.