May want to look at the innokin SVD. VV/VW, multi-button design, and you can lock the settings easily. Telescopic, so if 18650 mode is too big, you can use it in 18350 or 18500 mode.
I don't have tremors but I often turn mine off just chain vaping so this might be a problem too. I also have a SID which I have found myself accidentally changing the settings and vaping a 2 ohm coil at 15 watts doesn't feel good on the throat.
I think the best way to go would be a mechanical with a kick.