Irem Aytepe

Maybe you fall asleep too late?
If you have enough sleep and eat well in the morning, your body should be in top condition to learn.
Have you tried several methods to learn your lessons according to your memory type?

@Loo, thanks for pieces of advice. I haven't tried any method, what's them? 

You are looking for your type of memory: visual, auditory, tactile.
And then you work on your lessons according to this memory, to better retain.
I'll get you a test.
There you go: https://www.digischool.fr/methodologie/revisions/test-type-memoire-12064.html

https://www.reussirmavie.net/Les-techniques-de-memorisation-pour-retenir-ses-cours-sans-souffrir_a2594.html

I also find it convenient to use mind maps to learn more easily.
 You will certainly find explanations in your language.