My first rebuilding experience was in rebuilding my Protank and Vivi Nova coils. I learned how to torch, wrap, and torch the coil without having to pulse it, since it would burn the insulators of those heads. It is *not* what I would recommend to someone who is just learning to rebuild. The reasoning is simple. First, you have a tiny, itsy, bitsy space to work with. Two, like I mentioned earlier, you have to really be careful pulsing it to work out shorts because those soft rubber insulators will burn. So take it from experience and go get a RDA or RBA.
An RDA is actually quite perfect to learn on. An Igo-L is probably your best bet, though if you're inclined, any RDA that has single coil capability will work. This includes the Tridents, Omegas, Magmas, and other adjustable airflow RDA's with a single air hole option. With a RDA, you have a wondrous amount of space on the deck to build and accessibility to your coil and wick with the simple removal of the cap. You'll get to build, take down, and rebuild to your heart's content!
If you go to rebuildable tanks, the easiest to build are the Kayfun types. Doesn't matter if it's an authentic Kayfun, Russian, or well know clone. They have a large build deck and easy to install coils. The downside has already been mentioned, but basically once built and fouled, you have no access to your wick and coil until the juice in the tank is gone.
You have some great supplies. 28gauge kanthal is the best wire to start out with. It's thick enough to give you some stability with building, and thin enough that you can wrap it to a safe resistance without going into double digit number of wraps.
Btw, I moved from the Protanks and Vivi Nova's to an authentic Kayfun Lite +. Then I got my first RDA in the form of an Omega clone. Nowadays, I haven't rebuilt my Kayfun in over a month, just rewick it after a couple tanks of juice. But my RDA's, I recoil every few days, because I really have fun with them and love trying new builds. My wire selection also started with 28gauge. Now I use 30 gauge (to twist), 28 gauge (to coil my Kayfun or RSST or twist for my RDA's), 26 gauge, and 24 gauge (building very low subohms in the 0.25-0.30 range).