Really, Fifty, you don't have to depreciate yourself to learn. There is WASTE and DIFFICULTY in learning more about vaping, you aren't a crackhead or anything else. You are just moving forward and building skills.
My vape nirvana has been littered along the way with failures, buying equipment that did not suit me or etc. I just kept counting the "costs" of COPD, and my desire to be successful at vaping. Every single penny I spent was worth it, including selling some equipment that did not work, or even giving it away, but until I did either, I just shoved it in my vacopalypse closet so I did not need to think about it again, ever. I found that happened less as I built my skills, but it's really important not to be wedded to a particular piece of equipment if it wasn't working for me (at that moment, or potentially ever). I'm super happy with my vapes at the moment, and I think I'm on month 7 or maybe even 8, I don't always keep track.
If you like your dual coil RTA with your usual builds, save it for that? I mean, I assume that you aren't going to vape a mech all the time, they aren't the most portable/safe objects to carry around everywhere.
Start researching a good, clone RDA that shines with flavor on single battery mechs, in fact I am certain (I am not your gal) that you can get some good recommendations with ONE question on this thread....
Hang in there, don't beat yourself up for lack of perfection/knowledge, we have ALL been there at one point or another. Calling yourself a crackhead is just putting yourself down and frankly, the less emotion going on as you move forward, the better.
Your approach needs to be calm, considered, and rational. I think you are gaining the skills you need, just relax and maybe try some different things, if not right this second, when you are able.
Mech's don't dissolve into a pile of dust if you don't use them immediately. They are really rather durable as long as you don't blow yourself up. You are going to be fine, just watch, and looking back, you may go, "Oh, wow, I really persevered and got where I needed to go." It's a great feeling, so don't pressure yourself, mainly.
Anna