You don’t have to know the scales. Just being aware of that there are some notes organised into what we call scales/keys, is enough when starting out. I don’t know what all scales or chords are called, but since I’ve done years of ear training, I don’t really need to regardless. Unless I’m trying to explain how to play some specific thing for someone else that knows these things, it’s really pretty useless info, actually.
EDIT I can add that I
I mean it in an encouraging way haha. Of course you can do this shit, if you slow the fuck down and focus on what you’re doing, while doing it, otherwise you won’t learn shit, ye? The body/muscle memory does not differentiate between playing something the “wrong way” or “right way” you know, it’ll still internalise the shit you are actually doing. This is the reason you want to do it slow af, and focus on very basic shit, consciously.
Starting out with just getting to know the instrument, whatever it may be, is the first step. What kinds of different sounds do the keys on a keyboard instrument make? How can you articulate those sounds? Put on a metronome at 60 BPM, or slower, and just play one note at a time, with one hand. Start with one finger, or two, alternate, then do the same with two other fingers, etc. It does not matter which notes you play, as long as you play it in sync to a tempo. You have to like every note you play or whatever some jazz dude probably said once.
It’s a very iterative process, but in time, you’ll get more familiar with how to position your hands on the keys, and develop a sense of how far different intervals are from each other. When you feel comfortable enough just doing this, then you can start thinking about scales and whatnot.
This W-W-H-W-W-H-W formula works for finding the major (Ionian) scale, anywere on the keyboard, regardless of which note you start with. Actually it works for all (Western-tuned) instruments across the board.
W = Whole step AKA 2 keys
H = Half step AKA 1 key