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Maybe best to seminar first the risk beneath on online gambling and what are things that needed to do so that his friend will not get caught to much for gambling online since if he just let him loose without proper guidance then might he will get addicted and worse things came after that, and In my case I never introduce my friend with casinos since for financial reasons but I always push them to go with sportsbooks and bet on our favorite teams and sports, It's nice to have a good topic about it while watching the game rolling on.
In my case, I never introduce my friends with online gambling because in my country, playing gambling offline is prohibited, and there is a grey rule about online gambling. Although in the end, the gambler who play online gambling can get jail too. It is a personal responsibility for playing gambling or not, whether it is online gambling or offline gambling.
I never suggest them to use sportsbooks and bet because that will be up to them, and I don't want to be one of many reasons why they lose their money.
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Honestly, I recently stop gambling for a while. But this is what me and my friend do too. He thought me how to get coins from the faucet and those coins are allocated for our gambling. I think this is a nice suggestion. I hope OP will see this for his friend. It is kind of a safe bet too, you aren't using any money allocated for the essentials you need specially during this pandemic. Me and my friend bet in esports(CSGO and DOTA 2) because that's what we play.
That is good, at least, you can reduce your time in gambling. I still try not to play online gambling while at the lockdown status in my country because I am trying to use my time with my family. By using the faucet as the source for playing crypto gambling games, he and his friends will not think about deposit the money, and he can use the money for another thing. That is one safe way that he can do, and he can enjoy gambling games.