I'm in the same boat. My strategy is hitting it hard, using every tool at my disposal.
1. Finasteride (from family doc - easy to get a hold of)
2. Minoxidil (from CVS, generic 5%, slather it all over my balding scalp, not just the crown)
3. This took longer to get, but spironolactone from endocrinologist, and estrogen a few weeks later.
4. Iron tablet once a day, along with a multivitamin and 2500mcg of biotin.
4. Hair transplant is on the way for the areas that haven't regrown using steps 1-3 (and it's less of an area than you might think once the drugs get to work; hairline stuff really.)
The key to any kind of reversal is getting rid of the DHT. You can pussyfoot around the issue and try herbal remedies or head massages or laser combs or chili peppers, but really you should go big or go home when it comes to hair issues.
Side effects? The usual "problems" for men are generally benefits for us transgirls. Boobs, loss of libido, testicular and prostate shrinkage, etc. There's some crazies out there who think there's a big conspiracy to hide the side effects of finasteride, so be careful what info you're getting and from whom.
But there's plenty of us here who can attest to the fact that once you start to lower your testosterone and increase your estrogen (and block DHT), hair really does come back. It's not fast, and it's not necessarily hugely impressive, but it's significant long-term regrowth.