OP, I am not going to give an opinion on whether you should or shouldn't vape. That's up to you.
My perspective: I was a pack a day (at least) smoker from age 13 to almost 30, and quit cold turkey 14 years ago next month.
I started vaping for a few reasons, chief among them because I've struggled with my weight for my entire life (being 5'2", female, and hitting middle age doesn't help) and once again was at a weight I wasn't comfortable with. I was laid off last May, was unemployed for several months, but now work from home. I am someone who eats when they're bored and has a hard time distinguishing real hunger from boredom hunger so the weight started to creep back up with so much ready access to food and so much free time. I also LOVED smoking, but I will never pick up another cigarette again.
I started to vape as a replacement for snacking and loved it from the second I tried it because it had everything I liked about smoking and nothing I didn't. I started at 0mg but moved to 6mg and vape that pretty much exclusively now; it's a very mild appetite suppressant (I eat meals, but don't snack, and can tell when I'm actually hungry) and it seems to help me focus (ADHD).
I can't vape 12mg. It's too much for me and makes me dizzy and sick. I can chain-vape 6mg all day without any ill effects, but 12 makes me feel really ill.
Unlike when I was smoking, I can go for quite a while without vaping and don't have any "nic fits." I'm not sure how addictive nicotine is on its own. For me it's really the action of vaping and the taste that I crave, not the nicotine.
I tend to agree with everyone else that your nic level is too high for a non-smoker. I'd drop it down to 6 (or less) if you want to keep vaping and see how that goes.
As for risks, all of the research I've done myself shows that it's negligible at best (the Drexler study is a good one to read) but that's your call to make too.
For me, vaping has been really great, and I don't have any of the side effects from smoking (no coughing or wheezing, my lungs feel just as they did before I started - clean as a whistle).
And that's my 5 cents!