I totally agree with what you're saying, and I know it is so much tougher when you don't have a supportive family. People will come and tell you things like "Live your own life" or "Stop worrying about them" but they don't know the struggle you go through everyday.
You're gonna do just fine. They have lived their lives, it is time for you to live yours. My DMs are always open if you want any help. <3