its pretty easy to start over in DMM.

You get the updated warehouse where you can keep up to 999 of every character material

Quest completions stack up after every individual one so you dont have to constantly click off them off, you can also claim all quest rewards in one click on every tab

Theres usually an abundant amount of raid bosses all the time, if there isnt just refresh with the equipment swap trick

You get a free 6 star random ticket and a 6 star knight with an increased critical boost which is pretty important in DMM

You'll also get constantly barraged by flower gems every day by the staff

Theres also these things called Manyu Keys which gives a Manyu of one type depending which one you pick and every stage gives a pretty hefty amount of experience when you're low levelled, and they dont cost any stamina to do

You start off with 200 character slots which should last you at least a year before you even need to expand, but you will need to expand equipment slots, which is practically free with the amount of gems they give out everyday

Battles are also incredibly fast and I do mean incredibly fucking fast because of excellent optimization