The old outdated way of remembering piano notes is to remember them with a word using the first letter of the note. while on the surface it seems effective, it is actually very slow and could waste you years!
Forming a deep understanding of the pianos benefits and also your goals in piano can help you appreciate the time you commit to your practice knowing that you are working towards an admirable goal. This helps to build beneficial serotonin during your practice as you reach new achievements.
The cost of traditional lessons often puts the piano out of reach for many and thus online self-learning becomes the only option. Mozart was self-taught and he didn’t have the internet to learn like we do today, so that should prove it is possible.