As a single person, the best way to do it is to not actually hold the money and let someone else handle it.
There are companies out there such as MangoPay (not affiliated, just an example) that can give you an API through which you can collect & release money without ever having direct access to it.
There's probably still some compliance/regulatory stuff that you'll need to get through but I'm sure such a company will be able to offer advice (they want your business after all).