I'm thinking about having a VBAC and I'm nervous about the risks involved. Advice from experience?

I had an emergency cesarean at 27 weeks with my 2nd baby, due to preterm labor and then a breech baby. (My first baby was born premature at 21 weeks and was so tiny he basically just slipped out after I got an epidural - I don't know if that counts as a full l delivery for my first baby) With my cesarean my labor was so sudden and my uterus & stomach muscles still thick that the incision went through a lot more tissue than a full-term cesarean and I had a very long and difficult recovery. I believe the scar is low-transverse which is the safest scar to try a VBAC. I just did some research on VBACs and I'm terrified of the risks such as a ruptured uterus. Does anyone have experience with a VBAC and any advice for me in considering one for myself? I'll be discussing it with my doctor but I would love some personal stories on top of medical advice/opinion. Thanks.