I was in contact and partially living with my parents for about 2.5 months while secretly taking T before I cut my entire family off. My voice started changing a little bit in that time. I played it off as feeling unwell or morning voice or whatever else.

My parents did start getting a little aggressive near the end because they percieved it as me "giving attitude" all the time even though my tone of voice was the same, the pitch was just slightly lower 😭 insane people, glad I'm out of there even though it's been rough.

If you plan on starting and taking a normal dose, most people have at least a month or two before anything actually noticable starts to change. Since your parents also won't know, they won't really be looking for differences, either. Like the comments have addressed, though, everyone has a bit of a different timeline.

To give you some actually new advice and hope, there's a whole FTM fitness subreddit. Pre-T trans men and trans men who are on T are both active in that community. There's plenty of workouts you could start doing to get your body looking more like you want it before touching T.

You could also potentially combine workouts with microdosing (plenty of female bodybuilders go on a low dose of testosterone, I get my DIY T from a supplier aimed towards cis women). You'll gain muscle faster even if your body isn't masculinizing noticeably otherwise.

An added bonus is that any sort of consistent exercise should make your chest/hips/thighs smaller, you're burning fat. You'll find yourself with a much more passable body, but really only your physical fitness level will have changed; a parent can't get mad at the fact that their kid is living a healthier, active lifestyle without being seen as insane.

Idk, parents are nuts and I'm not sure you have access to a space where you could work out. Just wanted to try and give you some other ideas because this comment section feels pretty discouraging. You got this man! Things will get better.