Nightmare weed problem in backyard

Hello,

I have a very stiff downhill, so usually did no much cleaning in that area. There was some kind of plant grows that was just for show. But the weeds started to grown around them now. And I have alot of different kind of weeds and wild planets growing. Right now everything is dead but soon they will be alive. What is the best way to get rid off them I was planning on dumping a lot of dirt to level it. But I dont have enough space to go in the back with a truck.

Any advice will be helpful.

Thanks

Nightmare weed problem in backyard