I live in PA. My husband wants a quick "painless" online divorce because he knows I cannot afford a private attorney. I stay at home and take care of our two little boys, one who has a learning disability and possibly autism . I don't know where to go for help regarding child support, custody, etc.

I would suggest contacting legal aid and the domestic relations department in your county.

I don't think it is about quick. In addition to the divorce itself, there are property division and child custody matters, and probably spousal support and alimony issues too. You should get legal counsel- legal aid, legal services, or pro bono thru a bar association attorney. You have a lot to talk about.
If you do the internet divorce form route, you should go get representation from the state or local prosecutor for child support and custody matters. You would still need to address property division in the court granting the divorce.