If you new, you want to stay away from rarity upgrade.
You want to use ★5 girl as your main force.
Also you want to pickup some strong event girls from the perma re-event tap to help in your squad.

For evol and bloom and can wait for the special map.
The map will drop all kind of thing you need in evolution system with only 60 stamina to play it.
This special map will be online in every several months.

I can't tell thing on DMM go faster than Nutaku or not, but if you're freebie here is the place.
You can receive lots of gift every month with normal login campaign and special login campaign.
But one thing that DMM never give you for free is rainbow dreesbloom.

I think that's all for now.