The benefit to using 8.x is fast prototyping, so I'd *personally* stick with it awhile before jumping straight onto Studio. I still use 8.0 for this purpose quite a bit.
General advice using GM: I'd just say don't get too attached to the drag and drop stuff, learn the fundamentals of coding and shift over to using that primarily ASAP. Basically, once you know how to make it do what you want it to, learn how to convert what you've already made into code and you shouldn't need the d&d training wheels anymore.
As for starting slow, that's just part of the process.
I started with 'game-making' toys like Blast Works and Dezaemon way before getting into any actual coding. (and speaking of ClickTeam, you should've seen some of my failed attempts to make anything with Klik & Play back in the day. )