Hey Livio,
i highly recommend using the platform's built-in features. Focus on opponent tendencies and betting patterns, and use key information like player types (e.g., tight-aggressive, maniac) and important hand details (e.g., significant bet sizes, board cards). Organize your notes with a consistent system and review them regularly.
But always be careful, we all learning and getting better.
I wish you good luck,
Natox