Groups probably wouldn't be the best choice for this. They make sense in your head for this, but they're more for enabling/disabling an enemy's ai out something.
You'll want to use variables and functions more than likely--it'll save your butt later. Groups would be a lot of repeated code in this case. So if you want to change something later, you would need to make the same change repeatedly by hand for each group. If you just had it all reference a variable instead of hard-coding your numbers, you could make one change and not need to go through everything again. Definitely check out a tutorial on findings too. You could call a certain event with unique values anywhere you want in your code without any copy and pasting.
Use variables and functions. At some point, familiarize yourself with arrays and dictionaries, too if you aren't already!