woot! Go for it

Hw wise, if you seek low price entry, go for dory which you can snatch for ~50-70€ used but good condition.
downside of dory is low display resolution, tiny battery and lack of wlan. (not supported now anyway)
lenok has nicer and brighter display but is not quite as good maintained afaik.
Owning both i will go for bass next as it seems to combine nice hw and support. Also Jolla choose bass for theyr stuff so maybe if jolla ever releases something smartwatch related, bass is the likely candidate. anthias, wran, sprat, swift & tetra seem to be initial ports with much work to do, but i may be wrong and would love to hear contrary reports from users!