How safe should I feel with my hairline when starting Estrogen? (MtF)

I'm starting E soon and I have really long hair that is obviously important to me. My hair line might be a little receding but not too bad.

However, every single cis man in my family is balding, two totally bald brothers, two balding ones, my father and uncles are bald. Some totally hairless by 30 and I'm 23. I'm the youngest by 11 years so it hasn't hit me yet.

The professional I spoke to when getting prescribed said Estrogen does help with keeping hair, but I'm really curious as to what extent? What's your experiences on your hairline if you use E? I've seen conflicting info. Frankly I have my ideal hair naturally and would like to keep it.