When do you become too masculine to pass later on?

For the record, all trans people are valid and I will always see people for who they are, this question is for me. DO NOT READ AHEAD IF YOU ARE MENTALLY UNSTABLE AND OR DEALING WITH SUCIDAL IDEATION, I promise you that whatever you think you’ll find that’ll help will not if you’re dealing with that, take it from someone who’s been there.

While I’m only 18 1/2, I feel like my body is already so masculine, so damaged by testosterone that there’s nothing I can do anymore. I’m sure a lot of you can understand this agony of feeling trapped, of feeling like no choice you make can help in any way, but I want a second opinion because this one is really self consuming. I know it probably won’t help because I’m still masculine, but idk, I guess I just haven’t seen anyone super duper masculine at 18 ever really pass yet (because I haven’t looked and I’m scared to)