What are the affects of estrogen?

Hi there, so I'm Agender (I prefer they/them I like she/her and am neutral to he/him) and was born with a masculine body and I don't like that, Id prefer to look "undefined", like between looking feminine and masculine, and was wondering if I should take estrogen or would it be too extreme for what I'm aiming for? And if estrogen is not what I need could u pls advise in what I need?