Transgender vs Transsexual

Does anyone know how to figure out if you’re transgender or transsexual?

I always have experiences of people not knowing i was trans and suddenly they find out and invade my privacy and ask a million questions about trans people and how transgender people have been in social media or non binary people and I just can’t help but feel totally disconnected from the transgender community. Why should I have to represent the whole community when I say i’m trans? Do I tell people I’m a transexual? Can I be a transexual?Am I just transgender? II feel like I don’t owe people an explanation to the difference is but how do I identify with one of the other? I’m 20 years old born in 2004. I always get told people can’t be transexual because it’s outdated but what if I feel more connected to the terminology?