Thanks for query,
Is your child hood surgery performed on penile muscle.?
Bending of penis has anatomical position due to musculature.It is some what aggravated in your case may be due to soft tissue injury
You got erection is good but there is a problem to sustain it.
If it sustain i don't think you have difficulty to penetrate.
When you actually go for sex ,& if you have penetration problem then its treatment should be decided.