Hi @Jukobe and welcome to the forum! It's a lovely place full of very helpful people.
Congratulations on buying the Stream Deck and KM. It's an incredibly versatile combo. Make no mistake though, we're using it in a way that neither developer foresaw, so you're going to have to be patient and get your hands dirty. The first thing to do is spend a week or so getting to grips with each product's core functionality. Set up some SD profiles with hotkeys and explore all the other button types. Use your imagination and think about what problems they could solve for your own way of working. Go through the forum and download any macros that sound like they might be of interest to you. Open them and have a look through the actions to get an idea of the thought process behind them.
Before I start making videos, what is it you're confused by? I've done my best to lay out the steps above, so if any of it's unclear, I'm happy to explain.