With nothing that I can really offer, I can only really suggest a set of good faucets or something, moonbit is a faucet that is my fave recently
You can earn coins there quickly I will admit that. He also wants coins to come in large amounts. This is not possible from Moonbit or any other faucet unless you get super duper lucky. Try other things though as I suggested earlier.
faucets could be effective if you have a set of referrals to back you up and increase your earnings in a small amount of time
but as stated in the op he has some skills in coding which could boost his earnings
referrals are better in other sites, like gambling sites and similar
you basically will get a tiny part of the tiny amount the people you refer get
I think it is not even worth the time you spend to spread your referral