Stretching for straight dick

I really want to get on board with an extender to straighten my curvature (25~ degrees to the left) but I’ve been suffering from hard flaccid for about 8 months (literally just firm flaccid as a side effect, erections are 10/10 and no pain) I’ve been to a urologist and he told me everything was fine, but I know otherwise, thing is I’ve kinda forgotten what a normal dick is supposed to feel like now, I can’t remember how firm is was before, any pointers? And am I okay to proceed?

When using an extender, how much force is applied? If I can straighten my dick using minimal force then that would be perfect, do you really need to stretch it out a good distance to get the right result? I swear anything more than a few mm would be a big ask ATM.

And when stretching (for length and curve correction) are you primarily stretching the tunica or the ligaments? Is the tunica supposed to stretch under load or remain the same length?

The goal is really just to get my dick pointing near to horizontal and straight, that is all I want, anything gained is a bonus