A dildo. Get to know yourself and what you like a little and it's legitimately brain melting. You don't have to be gay to enjoy em, I'm glad I gave butt stuffing a try.
Just make sure whatever you get is actually body safe. Silicone is generally the only good soft body safe material, look for medical grade or platinum cure.
For me getting my first dildo was probably one of the steps that led me to finally acknowledge to myself that I'm trans (and also coming out as trans) so there is that 🙃