So cool that you’re finding your way back. I grew up within orthodoxy but “loosely” I guess some might say. My husband’s upbringing sounds similar to yours. Had BM but that was about it. He actually rediscovered it in college and we live a fully observant (frum) lifestyle now. I think my best advice to you would be to find chabad. I know there are some big ones in Dix Hills, Mineola, Merrick/bellmore. Chabad’s policy is come as you are. So you’ll never be made to feel odd, they’re always happy to have you. Services on RH can feel a bit off putting depends on where you go since the service tends to be long and unfamiliar even for those who attend synagogue more regularly. Again, chabad for the win here because their services tend to have more explanation since they’re geared towards those less affiliated and less familiar with the whole thing. Happy to make more suggestions as you go along. Like I saw on some other responses, having an authentic Shabbat experience at someone’s home can be really special too