but I sometimes mix up one F Major chord thinking it is a D Minor in inversion.

LoL... I can very much relate to this 😂. Don't forget C major and A minor too! Actually, this reminds me of a little section in Liszt's liebestraum with a couple uncomfortable arpeggios for the left hand.

_{Lol, I could never really get my fingers nor muscles to hit that A note for the A minor arpeggio. Instead, my fingers kept on hitting G for C major!!😭}

Also, I found your practice section quite refreshing. There's something so relaxing about this piece slowed down, that really makes you appreciate all those hidden voices, textures, and harmonies Rach so cleverly shrouded amongst all the many virtuosic and CHORD induced passages in this prelude.

You're doing great! Well done! And I'll be looking forward to the final performance hopefully at the end of this year.