I'd start off with a Vamo V5. I'd probably go for the Stainless steel option, even though they have sharp threads, they're good. The VV/VW option is nice, and it's built in protection is good. I'd probably pair it up with a good set of sony 30A 18650 batteries (30 amp). Even though the Vamo has a 5A limit, getting the batteries now will open the option if you want to go mechanical in the future or not. The nitecore battery charger is a godsend compared to el-cheapo chargers. They charge almost twice as fast, and can be used on a variety of batteries. For tanks, that is up to your comfort level. for beginning, I'd suggest a glass protank. Even though I do not own one yet, I have heard great things about them, and the glass option means you won't have to worry about what Ejuice you use with it as much. IF you want a beginning RBA, I suggest the AGA-T2. the setup on it is extremely flexible Again I would go with a glass tank.
IF you decide to go with the Protank, go ahead and get yourself a small single coil dripping atomizer to play around with as well. This will allow you to try out coils, settings, and juice.
All this advice is assuming you're switching from EGO batteries. Others suggest the Innokin, and they're great products, but for me, if you decide you want to go into something more advanced, the MVP will be put to the wayside, and all new prodcuts would be needed. But they are a good "go-to" device.