First, I think you need to figure out what kind of RBA you want to get. For some, they are the only way to go and can provide an excellent vape, perhaps even, an unrivaled vape. The best way to check them out is to review the RBA forum posts, look at different dealer sites that sell RBA's, and then to watch a bunch of YouTube Videos. For example, I use the Ithaka from GG, the Kayfun 3.1 and Lite from SvoeMesto, and the RSST, a copy or clone of the AC9 from Vapinaze. For RDA, rebuildable atomizers I have several clones of many popular devices and am looking at getting the Origen from Vaping Craze, when they come back in stock. Many of these devices have both inexpensive clones (Fasttech) and very good quality clones. For example the Russian is a clone of the Kayfun 3.1, and was recommended earlier. I started with several less expensive clones to see if I liked the RBA's, and to learn how to use them, before investing serious monies into the real high end gear. Some of the high-end gear is very difficult to get from time to time, anyway.
Second, once you have your RBA identified and you've watched a lot of YouTube videos on it, I suggest that you learn everything you can on battery safety and Ohm's Law. Good sources are Battery University and YouTube. A good Ohm's Law calculator is invaluable. You will also need to get an Ohm Meter, or use one on the battery device, if you go that route, or ideally, do both.
Next is to check out YouTube videos on building coils, and obtaining the rebuildable supplies. You will be able to select wicks with different materials from silica to cotton to mesh. The YouTube videos were a good guide for me. I suggest building your first coils with resistance of 1.5 Ohms or higher to start, as these will work on most PV/APV's.
Finally, you need to decide on what type of battery you want to use, either mechanical or regulated. Most regulated mods won't allow you to go below 1.5 Ohms, but I usually build my coils between 1.5 and 2.0 Ohms and then can use them on any device. Once you figure out the battery type, then we can probably help you narrow down the choices between Mechanicals or APV's.
So, there's a lot of learning to do, but it's not weeks and months worth of learning. Many of these things can be learned in hours and days, it's just that there are several areas of expertise that you have to learn before you can safely use the RBA's. I've seen many users learn everything they needed to know if one day, and were building and using RBA's the next day. It just takes what it takes. That being said, most new vapers don't get into vaping with RBA's, and we often discourage it because there is a learning curve, but that doesn't mean that someone with real determination couldn't do it, just be safe in the process. Our batteries are nothing to fool around with, and knowledge is your most important safety feature. Also, the regulated devices have many safety devices built in, so we often recommend them for newer members. This is a quite involved subject, and I'm just touching on the edges without much detail, but I wanted to provide some information in answer to your query, and give you some outline thoughts about the process you are about to undertake. I found that once I had done my homework, RBA's were quite easy to use, coils quite easy to build, and was happy I decided to include RBA's in my VapeQuest. Good luck to you! My two cents. Safety first!