well, where to start...
As a DL vaper, interested in flavor, not clouds... but limited to factory coils uhm?
i might recomend aegis kit, comes with a vaporeso tank, respectable flavor, decent clouds, coils are easy to find, and the quality of this aegis line up is amazing, most of them shock, dust and waterproofing is amazing, so that might be your mod... no doubts!
About coil, well you dont want to spend a fortune right, well getting factory coils economy is not as desired, making your own coils is arround million times cheaper but also 10million times flavorful compared to factory coils, so, there is not that much science here.
Whats is the main point of dont wanting to learn a bit more of this hobbies / passion / lifestyle? (if is not that much to ask that? )
At my beginning in vaping, i was looking for a decent way to stop smoking without trowing away a fortune, then realized that getting new coils for my 1st setup with coils (Joyetech eGO vtc mini 1, with several their tanks, i bet i still have a cubis around) then a friend gifted me a Wismec Theorem RDTA, still have and learned a lot of vaping, got into battery safety too, coiling, wicking and plenty more, a complete ride my friend stated when beginning, now i not use anything but RTA-RDA-RDTA.
RBA world could be cheaper! cotton is a must, but coils? coils could be purchased one by one, boxes of mixed kinda coils and wires and my personal desired way, get a spool of wire, make your own...!
What to know when building will be according how much you want to try and learn, cuz you could also learn how to rewick and save money... or you could learn a bit more and get prebuild wire coils and replace, there are several options sir, and let me tell, you wont regret breaking the dependence of overpriced factory tasteless coils.
... my two cents...
Regards,