Hypnosis is a very powerful way to improve your ability to retain information, feel massively motivated to study and get focused. I’ve used it for years in fact.
A few years ago I hired one of the UKs top hypnotherapists to records a CCNA Study Success hypno track. It’s very powerful so please do not use whilst driving or operating machinery. Use it before going to bed each night and if you can, once upon waking and once in the afternoon. It will make a big difference.