If you don't have money for a fucking pot, should've saved some before starting to grow.
Anyways, If you clean 'all' the paint out and drill some holes, it'd be good.
Next, you should buy good soil, not steal it from woods, because first - it may be infested with bad bugs, second - it may have bad drainage which will cause overwatering.
OF course, as you came here for help, not for replies like these, i can advise you to take dirt from the place where a mole dug it up, that should be better.
Check for some worms/shit, and you could really buy some perlite for a few bucks. ( Is that so hard? )
Edit: sorry, just read you are reeeealy tight on money. Then you could just put it outside in ground, otherwise seek a solution yourself