Get a job.
This begging thing is ridiculous. You can't come up with $20 bucks at 15? I'm sorry, but that is pure and simple laziness. Perhaps if you spent less time modding video games and more time learning valuable computer skills you wouldn't have a problem.
Learning skills is harder than it is. Most jobs arent even available for 15 year olds. This is really frustrating
When I was 15 I was pressure washing driveways, mowing yards, fixing computers, and plenty more. If bitcoins were even a thing back then I could have rode my bike to the store to buy a prepaid giftcard to get some. I can't remember exactly, but I was even dropshipping things from tradekey on ebay for a while around the time I was 15, up till paypal closed my account and demanded tax info due to the volume moving through my account.
If you keep thinking learning new things is hard you'll never learn anything. You obviously learned how to mod video games, am I right?
You are looking at things all wrong. Begging is hard.