A lot of this depends on your level, goals, mentality and how many of your sessions are matches vs training sessions.
Padel is highly technical and a fair degree of training and drilling is required to reach a certain level of play, due to the buildup of muscle memory and consistency.
For mentality, everyone is different. Personally, I have an issue when I start "pressing". Maybe I've been playing well for a few weeks and think I've reached a new level. Then I regress a half level and immediately get frustrated/start overthinking when it is really just a matter of variance because improvement isnt linear.
You should also trust yourself and how you feel. If you are disheartened and fatigued, thats a great sign to take a break! When you have a session where you feel great, congratulate yourself and make note of why it went well ("I really locked in on my footwork today, and that made me much more consistent!")
Enjoy the journey, there are always ways to improve 👍