Jeffrey, I think there's two ways of looking at being a beginner. The amount of time you've spent playing chess versus your skill level. I'd say if you're just looking at time it's a bad measurement. I learned 'chess' from my dad as a 5th grader. I didn't play it regularly until around oct 2021. So I've known how to play bad chess for decades.
As for skill it also depends on from whose perspective? A true beginner is somebody who just knows how the pieces move. A super GM might look at anybody under 2000 as a beginner. As a 1200+ in rapid you're getting to the point where you can beat the vast majority of people in a casual OTB game who just have a working knowlege of how the pieces move. From my perspective I'd say you're an intermediate player. As for bullet and blitz ratings, those take time controls and make them as big or even a larger factor than the quality of your moves so I wouldn't rate your 'chess' skill on those, but I'd say the fact that you are so good at clock management and making moves that aren't losing while down on time helps to push you firmly into that intermediate category.
Currently I'm 1250 rapid 1270 blitz and 1600 bullet,
regardless of percentiles I still feel like I have a lot to learn and honestly I feel like as my Elo goes up there is more things that I need to learn/ I am ignorant about, so what really counts as beginner?