I need ideas on how to handle my scarcity mindset.

I feel an existential dread. I'm 37 yo at the moment, divorced with one daughter from my marriage. I want to have a second family and more kids. I am scared that I don't have a girl for a suitable LTR at the moment, and I'm scared that it will take me at least 2 years until I get to the whole kids and family part (finding a girl, vetting, etc.). Therefore, I make stupid dating mistakes - I feel that I'm in a rush so I don't vet properly and choose poorly, causing lots of drama and no stable LTR.

There is a second layer to this, though. Having kids, and a wife is a need buried somewhere deep inside (don't know where yet). Its like having a family/kid is the only thing that will validate me. Note I'm RP for about three years now.

Any ideas on how not to be needy, nor rushing, nor scared that my time is running out. OR maybe I should just accept I AM too old?