'Every student can learn. Just not on the same day or in the same way.' George Evans
Sometimes you might wonder why it's so difficult for you to learn something new. There can be many reasons like lacking relevance of the topic, a misfit with regards to your current level of proficiency or just a bad day.
Apart from that it is your preferred learning modality that can make a big difference. Neil Fleming invented the VARK Model with 4 types: A preference for visual information (visual), for what is said or heard (auditory), for the written word (read/write) or for experiential learning (kinesthetic).
Do a self-test online or start to experiment with different learning methods like videos, podcasts, ebooks or simulations to find out which method you prefer.