Hey Alex, I've been practicing 10th planet jiu-jitsu for two years now, so I don't know if that counts as experienced or not, but here's my personal experience: my first year I was all over the place trying to apply anything and everything to my game. I don't know that this was the worst thing I could have done since you've got to find a style that suits you, and what other way is there but to try a bunch of different stuff. But at the same time, my game didn't really start to improve until I focused on a core set of positions and a core set of moves. For me lockdown half-guard and the Shield's pass (don't know if it has an official name, but Denny calls it that) became the bedrock to my game. Instead of trying to find new solutions to problems (e.g. deep half sweeps and flyover passes), I started focusing on tightening up what I already knew. I discovered that just because a technique looks simple and straightforward, there are nuances (or levels) to the technique that only get unlocked through constant tinkering.
I don't think you have to necessarily start with half guard though. Choose a guard that you can consistently get to, and apply yourself to making it stronger. Guard passing is something you can and should be working on while you're working on your guard game. Again, find a style (maybe the Marcelo passes) that you like and can hit comfortably, and strengthen it through constant use. Eventually, you will add different stuff to your game, but you need to have a foundation of a couple of go-to moves from top and bottom.
I just started wrestling practice, and it's reminding me of what is was like just starting out in jiu-jitsu. Listen to your instructors, and try to apply whatever advice they give you, but remember that everyone develops a personal style, and once you find yours things will feel a little less overwhelming.
EDIT: The above is all based on the assumption that you're new to jiu-jitsu, which upon re-reading your post, may not be an accurate assumption. If you already have a go-to game and are trying to inject 10th Planet into it, I would start with the basic rubber guard path: Mission Control > Chill Dog > Omoplata submission or sweep.