Did you have a late start in life?

I, 28F, am preparing for another educational degree. I'm not financially independent (I worked at a job one time for like 7 months and then quit. I wanted to study further). I have been living with my parents for 2 years now. I feel like a loser. By the time people reach my age they have a bit of stability in their lives. Everyone around me is getting married or thinking of marriage. My parents feel I should get married soon too. But I feel like I haven't achieved as much as I want in life, educationally, professionally or financially. Is there anyone else who had a late start in life and dealt with despair because of it? I feel alone in this.