I don't have the savvy for stuff like actually acquiring medicines, unfortunately. You might be able to just buy it from your local pharmacy; but if not, you could check https://hrtcafe.net/ or – as a sibling commenter suggested – look into minoxidil (which works via a different mechanism). I wouldn't recommend minoxidil unless its other effects would be beneficial to you, since I'm leery of things that affect blood pressure and circulation – but I'm not actually trained in this stuff, so maybe it's considered safer.

Finasteride is less potent, but is normally recommended for cis men; not sure why. Theoretically, I'd expect dutasteride to be the better medication (and https://doi.org/10.2147/CIA.S192435 bears that out) if you can get hold of it.

I'd have thought finasteride and dutasteride weren't safe to take if there's a chance of you getting someone pregnant, but https://www.nhs.uk/medicines/finasteride/fertility-and-pregn... says it's fine, actually. https://doi.org/10.4103/0974-1208.86093 goes into more detail on that. (I'm not aware of any other impacts on fœtal development, only the intersex condition mentioned in that article – note that the backdoor pathway described in https://doi.org/10.1002/dvdy.23892 also requires the 5α-reductase enzyme –, but I'd still advise caution.)