Grats!!!! Me too - unbelievably easy for me. I smoked almost 40 years, 1.5-2 PAD. And I started with a really annoying super-mini and Chinese "Tobacco" juices and I was so amazed. I had one cig while I learned to use the ecig and then that was it. In the first 2 weeks I had two screwups where I got caught with no charged battery (because I misused the PCC at work) and I had to have 1 cig each time but after that I bought multiple backups - spares of everything, 2 chargers at home 1 for work, etc. Then before the end of the first month I bought 2 better models to try followed by plenty of chargers and spare ports and I've been vaping them for 11 months. At around 6 months in I started to add some 3.7v fat long charge batteries and mods in case I needed to use hotter LR cartomizers to deal with the drop from 12mg to 6mg. Many people buy fat models or mods sooner.
I started on 18mg but to be safe I also bought a small bottle of 24 and a small bottle of 10-12mg. Ends up 18mg was right for me. 18mg and 24mg are the most common starting levels. Since then I have worked my nicotine down to 4mg which is hardly any TH but it suffices.