I got into RBA's and mech mods recently, and have now sold all my old protanks and VV devices. This is just personal opinion, but for me they look much nicer and you can get a fantastic vape when paired with a good rba. I bought clones to start with which range from about £20-40, my nemesis clone is by far the best, hits like a truck. They are incredibly easy to service as you can strip them down for cleaning etc without worrying about electronics and the like. Of course there are some dangers involved due to no control on power out put (apart from using a kick which limits the output), but in my opinion id say give it a go, you'll be amazed at how much better a vape you get.
You can get set-up for about £50 for a just a mech and atomizer, then you'll need wire, wick, batteries and a good charger. It's also advisable to get a OHM or multimeter to check Ohm's and battery volts.
The internet is a massive resource, I did loads of research before I took the plunge and was already building coils for my protank so had a fair idea of what to do.
TBH as long as your not aiming for crazy sub ohm builds, there pretty easy and stable to get up and running, just beware, you'll get the buying bug, I have now spent far too much money on different attis and mods