Sorry this is not career because I don't have a career yet but technical suggestions

Since you're pivoting to backend work you may be interested in htmx which allows you to have to superpowers over the frontend as a backend dev.

Elixir has a supportive community and people must quite happy to use it because they are very nice. Everyone seems to be loving it (including me) so they must be doing something right. I have only superficially learned it but it was indeed a fun and interesting endeavour. I haven't tried Phoenix, the Elixir web framework, but I hear it is similar in conception to htmx but more integrated with the language. Is the community thriving ? Well at least it's not dwindling and the morale is high