... Am I on the right track or should I conduct more research?
Welcome.
As others already said (and with greater authority than my newbieness endow me with) yes, you're on the right track. I think the EGO or Riva models are more flexible because low resistance (=LR) atomizers and cartomizers can be used with them. They're not recommended for use with smaller batteries like the volt, so this door is closed if you go with the volt. I mention this, because it's not unusual to crave a greater TH and/or more nicotine when one quits analogs - in the beginning at least. The higher temperature with LR increases throat hit.
Lots of new vapers quickly want to try something else. New flavours, box mods, variable voltage, different cartomizers/atomizers etc. They want this either out of curiosity or because they are not entirely satisfied with their vaping experience.
I'm not saying this is going to happen to you. But if you're no stranger to insatiable gearlust (for f.ex. tools, computers, bookshelves, garden elves etc.) and do not find researching this e-cigg stuff tedious & tiresome, be prepared for having a lot of fun & a bit more (initial) expenses.
The most important thing is to get started vaping. You already did that. Congratulations.
And please ask if in doubt. Extremely helpful and knowledgeable folks here.