If you can reliably purchase pills (e.g. they wont get seized in the post), then you can get estradiol and spiro pills and just diy with that. If you can get your blood levels taken regularly that is incredibly helpful and something you should do.
Additionally, there are ways to make gel solution yourself as well, and I remember a vendor selling premade gel in a medical pump container. Medical pump containers are really useful for gel because they dispense a set volume per pump and let you accurately measure mg of estradiol.