In Columbus, Ohio the Columbus Computer Society has SIG's (Special Interest Groups) [https://ccscmh.org/special-interest-groups/]. I don't know where you live but if it's big enough (and especially if there's a concentration of computers professionals) there may be SIG's in your area where you can talk with others like yourself. SIG's are especially good for presenting topics [as strict9 mentions] if you want to prove to yourself that you really know your stuff.
The Linux SIG, for example, is part of a larger network of Linux SIGs worldwide.
The Linux SIG, for example, is part of a larger network of Linux SIGs worldwide.
https://ccscmh.org/special-interest-groups/