A CE4 is a good place to start. Not a bad vape and cheap to get started. I am still vaping Esmart and T4 clearomizers on Ego style batteries. They take care of me. 3 months without a cig after 35 or so years of smoking. Hang in there you will start feeling much better soon. In 2 weeks or so I noticed much more wind and no morning little cough which I had started to develop with cigs. If you shop wisely you can get the equipment you need and be saving money in a few weeks or less. You will need 2-3 batteries and a few clearomizers for different flavors and some coils and of course juice.
I have 10 glass EVOD clones ordered from Fasttech for a bit over $3 each, takes a while to get them though from China. I ordered 10 or so coils too and plan on rebuilding them to save even more money. I have the wick and Kanthal ready. I shopped around when I started and got some 650 ma ego style batteries for under $7 each. 3 of them last me a hard days vaping. I got 6

You do need an extra charger as well for charging more than one battery at the same time and just in case one quits
Also watch lots of vaping vids on Youtube to learn the care and feeding of your clearomizer and other equipment. Also you will get ideas of what equipment you might want to later move on to.