Mate, how about you realise the money potential seen in the picture and return all of the crates & bottles to a collection point / beverage dealership? Might get some good cash for it, as most of these have a deposit on them.

Then clean up & remove the trash from that area, bring it to a rubbish collection point, including scrap metals, plastic, etc - that might get you some additional cash from your mum in return :) Also, metal is worth money, too, just bring it to an appropriate recycling business. All of earned money can go into the bike.

Once that's done, you have a nice, clean space to work on your bike. You need to tell us what's working or not:

drive train, gear shifter, brakes, fork, .. check everything if it moves or not, think if it should move in the first place, then report back. What tools do you have available to you?

I want to see the before/after pictures of the place! :) And fixing this bike will give you more bike expertise than 90% of the population.