I was raised "non-denominational", we attended several churches of different denominations. Growing up I've learned that it's not the building/denomination that we need as Christians, it's like minded people. You can find those anywhere, in any church. As for your son accepting Christ and being baptised, he doesn't need your Pastor to do those things. Just a group of fellow like minded Christian and loved ones. "Where two or more are gathered in My name there I am in their midst." He is old enough now, if this is what he wants, you and your husband pray with him.
I was baptised several times in different churches, it seemed as if each church didn't feel that the previous baptism was valid or something. The most meaningful one to me took place in the Red Sea and preformed by a man who was not a seminary trained pastor, but someone who had the gift and the heart for it.
Switching is easy, you're all Christians, you SHOULD be welcomed into any congregation with open arms. The trick is finding one that that "feels" right. Keep looking and if it makes you feel better do research on each denomination before you go. While the roots are all the same, each denomination worships and focuses on different aspects and interpretations of the Bible. The "switch" should be easy, just start going and when it feels right talk to the pastor or the other elders/deacons.
PM me if you like. We're still looking for a home church as well. Finding the right "feel" can be hard, don't give up.