I initially thought I wanted to mimac a cigarette as closely as possible in taste and form factor. I was very against trying other flavors. I couldn't find any tobacco e liquid that tasted like a cigarette. And now I can't imagine wanting to
You will be much happier with a small box mod and refillable tank. The box mod will give you much more freedom due to having longer battery life. Nothing worse than being away from home and having your battery die. If that happens to a new vapor, s/he will definitely buy a pack of cigarettes immediately.
To start, I would buy either:
Eleaf istick 30 or 40W, or
Innokin Coolfire IV
Both have a long lasting internal battery so you don't need a charger or need to learn about battery safety yet. If you can afford two, get two. Then when one is charging, you'll be able to leave the house with the other. Also, having a backup is important. If something goes wrong with one you won't be tempted to run out and buy cigs. One doesn't have to break for there to be a problem. When you are a newb, sometimes you just (temporarily) mess things up

. We all did.
I would get an Eleaf Air tank and extra coils as well. They are very inexpensive, and very popular here on ECF. Again, get two if you can. Just in case you goof one up, break it, and so you can have two flavors. One flavor can get boring.
Go to a B&M and sample juices so you can find some flavors you like.
I would also get 18mg e liquid. You've had a hard time quitting (me, too), and I think you'll need that extra oomph to get over the hump. They may recommend 12mg since you only smoke 15 a day. I never would've quit using 12mg to start. It took me 2 months of dual use to quit with 18. And yes, stick it out. Not everyone quits right away. If I hadn't stuck it out for 2 months, I wouldn't have quit.