Need help

So my oldest is 4yo and my youngest is 2mo

Both were c-section

We want another asap before I get my tubes tied we want them close together a year or 2 apart

My first c-section they didn't see the scar on my uterus on ultrasound nor during my second c-section it's just gone like i never even had a c-section

I have a lower case T on me if that makes sense so I have a vertical (my first) and transverse (second)

When would we be able to try again

My second was hard to conceive it took us a great while

When would be the best time to start trying as we wanna get our timing right