Since you haven’t found much in VSX have you considered looking for new CVs? Patrol lowish galactic latitudes and the SMC/LMC regions, perhaps, and see what shows up. Most will be Miras, semiregulars or eclipsers but you can ignore the red ones by checking with GAIA B/G/R photometry. It’s a shame the variability flag isn’t set in EDR3 or we could try to characterize newcomers.
Might be an interesting sideline. Certainly a golden opportunity to learn about how to handle big data — something amateurs are beginning to catch up with the professionals for many of whom it is now routine.
Good luck with whatever you decide.