It's impossible as the license is linked to a persons profile and sharing license will result in both parties losing license.
There was a 11 year old who asked the same and was given license and the KID decided to pirate it. So you won't get any licenses unless you buy it.
Construct gives you a free license with 100 event limit which is enough to make small games which you can give away for free. Build a loyal following and you can get funding by your fans using patreon.com
I warn you though. Don't take people for a ride - the internet isn't as big as you think it is. Your reputation is all you have if you want to make money. Mess with your reputation as the 11 year did and you can kiss your money dreams good bye.
Work hard making good free games. Build a huge portfollio. Put those games (for free) everywhere you can. Trust me, sooner or later you will attract a sponser, maybe even a position in a company.
But at 15 you can't get legally get ad revenue / or have a credit card or merchant account or anything, so use your time to build a portfolio of free games until you are old enough to actually make money from them.