Congrats on quitting, I quit around the same time myself. Only been vaping for a month now but it easily turns into a hobby/passion and sooner than you know it you'll have a lot of extra mods/tanks/etc. My only advice is to do the research and if you see yourself becoming more invested, go ahead and jump straight into a higher end mod or APV. Slowly upgrading will ultimately just end up costing you more money.