IMO, just buy a REO, you will want one eventually anyway no matter what you start with, and get going learning on different atomizers and cartomizers.
There are other worthy mods to be sure but hear me out; with the REO you can test tanks, cartos, or you can drip. You get bottom-feeder option as well.
There are so many combinations of
juice and gear that this may not be your end preference. It is a good start that you won't regret though. It will work well, you can sell it if you don't like it later, but I bet you won't.
Just my opinion and worth what you paid for it.