Thank you for your recommendation. I would love to read and learn about all those subjects, but my interest in reading only lies in Philosophy and Psychology, and it is enough to fill my spare time.
Yes, they are all different subjects, and you might already know their topics, and methods of studying are totally different from each other. For instance, if you read and study Physics, you would need all the laboratory instruments costing tens of thousands of pounds.
For instance, if you are researching radio waves, and its characteristics under solar storms etc, then you would need radio frequency receivers, transmitters, chokes, dummy loads, SWR meters, generators and various types of antennas installed and set up for your studies and research.
Philosophy doesn't need all these mechanical electrical instruments, because as you might already know, it uses reasoning, logic and common sense, and it is interested in analysing whether someone's claims are making sense, logical, valid, reasonable or even commonsensical.
Philosophy is not about blindly and pointlessly agreeing with someone's illogical, unreasonable and delusional claims or ideas. It is not about showering people with sugar coated consolations and positive encouragement for life, as some people do.
Philosophy is about seeking logical, reasonable and objectively true solutions to the problems by critical analysis.
I would recommend you to read "The Central Questions of Philosophy" written by A.J. Ayer on this particular topic.