As much as I love my Stingray X, it's not a mod I would recommend to someone new to vaping. The switch, while innovative, is a huge pain in the ..... It's a love/hate relationship... LoL I have it working well now, but it requires a lot of TLC.
I kind of agree with edyle here though, I'd take a serious look at a regulated mod. Something like an iPV Mini V2 or a Sigelei 50W. I wouldn't go too over the top, but the regulated mods are going to be more forgiving for a novice rebuilder til you get the hang of things.
With a mechanical, once you build the coil if it doesn't perform how you expect, you have to start over again. With a regulated mod, you can adjust to compensate for miscalculations in resistance.
Just something to think about
Good luck!