It's completely natural to be bad at a given task if you're new to it. Chess is complex, it's not an easy thing to master and takes years. Most people are "bad" for a long time before they begin improving. Believe in the process, it sounds like you're doing the right things it just takes time.
One thing I will say is try not to focus on openings, at your level it isn't what decides chess games. I watched chess network's series on youtube titled "beginner to chess master" and found it super helpful so I recommend you watch that through.
I had to take a few months off. I was literally melting because I couldn't get better regardless of what I did. I tried Aimchess, analyzing games, watched videos, did tactic puzzles, bought an opening course (but am too stupid as it seems), and instead of getting better just dropped more and more. So I took as I said a break.
Now I'm back, refreshed, or at least thought I was refreshed. Only to lose more often, dropping another 100 points, and getting the feeling that every second opponent cheats. So please tell me the players at ELO 500-600 have gotten better. Because I'm already on a mental breakdown because I doubt someone can get that much worse just by taking a break for mental health reasons.