Hiya Jeminajay
It's generally recommended that you drink very little alcohol, or even better, stop drinking alcohol completely.
Estrogen and anti-androgens are metabolised by the liver, and if you are taking estrogen orally (as opposed to a patch or injection) it passes through your liver twice - once after digestion and a second time after the remaining estrogen has passed through the rest of your body. So you are actually placing quite a metabolic load on your liver just by taking HRT, and some anti-androgens also produce toxic effects. And if you add alcohol to this mix, as well as any other medications, this just places more load on your liver, and this is something you should avoid.
Liver health is probably one of the most fundamental things to allow you to take HRT long term, so I strongly recommend that you do liver function tests once every 3 months or so. This is a simple blood test. If you are in a formal HRT program there are about 30 indicators in the blood test which should be tracked. But the most important ones are these: Cholesterol, Bilirubin, GGT, ALT(SGPT) and AST(SGOT). Those will clearly show if you are stressing your liver.
If you can, I'd seriously recommend you see a doctor with whom you can talk honestly about what you are doing, so that you can be sure that you are not damaging your body as you transition.
(And finally, if you stop drinking, you'll look and feel better!!!)
Good luck girl...!
Julia