I've also done tons of research, and not the actual act, but self medication with things that are effective is DANGEROUS!
There are a number of things that need to be carefully monitored by a professional. Also depending on the person it might not have much effect without also something to reduce testosterone, but even without that something the extra risks are there, meaning you'd be risking self harm for little or no gains. Basically, don't do this.
Then there's things like herbals which claim to be safe, which may or may not be true at their recommended dosage since supplements aren't regulated AT ALL, they can claim anything they want, as long as they print that it isn't intended to treat, diagnose, or cure any disease. But then the recommended dose isn't enough to feminize a male with intact testes either, so you'd have to take a lot, and at that point even if their claim that it's safe at the lower dose is true, it probably isn't at the higher dose.
Doctors or bust I'm afraid.