I believe SEE is meant for teaching English to deaf/hoh children in the classroom not for general communication. You will not find a true SEE group or classes for this unless it's for teachers I think. I could be wrong though.
Besides if you're going to meet people that are late deafened they are probably going to be more on the English side. I see all kinds of signing skills and it's a mix. Sometimes people still sign with more English order or with the prepositions. Others are flat out fluent in ASL and are really fast.
Try going or contacting this http://www.norcalcenter.org/ as they may have the resources you want like sign language classes and maybe support for late deafened folks.
https://alda.org/ - more for late deafened info
https://www.meetup.com/Sacramento-ASL-American-Sign-Language/
I understand that ASL is confusing, try focusing on the signs and basic sentences first do not worry about in order. I found that knowing the signs and of course fingerspelling really helps.
Good luck! 
