Did I miss the dating window?

I was pretty overweight through my late teens and early twenties. This, plus being isolated, and being very shy made dating for me basically impossible. I didn't really have a date till my late 20s and first couple of short relationships at the end of my twenties. Now I'm 32 I lost a lot in my mid twenties and have better confidence in social sittings. However I feel I lack the experience in relationships to keep a good one going.( sometimes I blame the failure on my last relationship on my inexperience) I also feel the opportunities for dates is much less. Did I mess up really bad by my life choices?
Did I miss the dating window?
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