Ah, Daniel. There's nothing wrong with taking a year, or more, to figure out the best solution you can get for yourself and your kids. You're making a decision for the next 40+ years of your life. It's worth putting some time into deciding.
My bet is that the folks who make choices that are both quick and healthy usually have more consistent info than you did, until Friday.
So stop beating yourself up about your handling of your W's infidelity. I know that's hard to do, but it would be good for you to stop.
*****
Your past, like everybody else's, is your prologue. You can't predict your future, but you've got some good externals - tall, not overweight, better than average fitness.
Your internals - beating yourself up about everything you are - are in rough shape, but the more you learn to love yourself, the more attractive you're going to be as a human being.
I am so delighted to read that other men are terrified of women. I like women a lot, but they idea of finding a new partner terrifies me, too.
Funny thing, though, I've read statements from a number of women who aren't all that certain of their own ability to build a new They may be confident they can find a sex partner pretty easily, but a new relationship is different from sex.
*****
Life is risky. You've embarked on a course of action that looks good for you and your kids to SI, and we have a lot of experience. You've said, IIRC, that it feels right to you.
It's not an easy course of action, but change is usually difficult in any case.
*****
I agree fully with Bigger on the idea of D with a goal of getting back together.
I'd add that I have a very hard time seeing how an xWS can build trust more easily after D than without D.
I can see that behavior during the D could build some trust - but if the WS is a good candidate for remarriage immediately after D, that WS is almost certainly a good candidate for R, so why not go directly to R? Why take the detour through D, a detour that is expensive in time, money, energy, and emotion?
*****
Back to Daniel - you're loving, lovable, and capable. You're about as loving, lovable, and capable as everyone else.
The only other thing you can ask of yourself is to recognize that you're loving, lovable, and capable. That's very hard for some of us, but it's doable.
BTW, you look like an introvert. My W is an introvert, and I can't express how attractive I find her because of her introversion. She has found a lot of solace from a book called The Introvert Advantage, and I recommend it to you.