How to approach the level 1

Hi, I have a full time job. I want to prepare for level 1. Can someone please help me to understand how do I go about preparation. I am really confused. I have the following questions.

1. Is self study sufficient?
2. How to plan your preparation?
3. Which coaching is best for preparation?
4. Are the 2025 books enough?
5. Any good youtube channel that you recommend for concepts.
6. Any place to purchase mocks?