It depends on situation.
I use a large green greenhouse breathing plastic in rows where my 4 feet wide bed will be. I place compost or green grass under it. Late witer or end summer is best.
After 4 weeks i remove the plastic and used it again somewhere.
Then plant.
Mulch with om but thin. Some weeds come through. I don t bather too much.
As you keep mulching fungies will dominate and the bad weeds will go. The new ones i just cut...no pulling out.
Slugs? Yes.part of the game.
Make shure to go daily in May and June. That s when they reproduce for next year.
It works better every year.
Patience.
Farming is a school. That s all.