I wouldn't worry about staying at the lower end. There is a lot to learn and experience.
I don't know which Joytech you are considering either, but I wouldn't shy away from an MVP. I have had three of them and they are well-built and the power is well managed to give a consistently good vape. All mine lasted longer than a year and were well abused in the outdoors.
In a couple of months you will have a much better idea of what kinda of mod to get. For me, when I get a new mod, my current becomes a spare. After a while, they get passed on to a new vaper.
Jumping into high-powered voltage mods before knowing just what a volt is is not safe. Relax, enjoy the ride.