You're not a fan of desert scorpions, but you list 3 arid/semi-arid species as your dream species?
I'd have recommended Hadrurus arizonensis as a good first scorpion that meets your requirements of being relatively active and ''aggressive''. However, it is a desert species.
Heterometrus spp.! Large, black scorpions from hot, humid areas. Easy to keep, although not particularly active.
.....there are so many species that would be suitable. Even the more venomous species are fine as ''starter'' scorpions so long as you use common sense and caution.
Babycurus spp., Rhopalurus spp., some Centruroides spp. and Tityus spp., most Hottentotta spp. would be ok if you keep your head screwed on and behave sensibly when handling them (handling meaning, feeding, maintaining etc., not actually handling).
Research some more, find a species that really interests you. If it's easy to keep and not too venomous, go for it.