Hi there! I would suggest strains high in CBD. They are great for anxiety as well as pain relief. In addition, high CBD strains won’t get you super stoned, so you can still function.
Here is a list of popular high CBD strains: https://www.leafly.com/news/strains-products/10-best-cbd-cannabis-strains-according-to-leafly-users
In addition, I encourage you to check out this page: https://www.hellomd.com/answers/5737ccdf2d7c49000c000180/i-smoke-cigarettes-would-switching-to-smoking-marijuana-be-healthier There’s some useful information here re: quitting smoking.
I hope this is helpful!