I think everyone's practice is a little different, and I highly recommend finding people IRL who meditate and ask them about their practice. I sorta have my own thing that I've made up in my routine. Happy to expand on it but not sure HN is the right place. Foundational books that got me going in order of importance for me:

15 Laws of Growth: https://www.amazon.com/15-Invaluable-Laws-Growth-Potential-e...

The Bhagavad Gita: https://www.amazon.com/Bhagavad-Easwarans-Classics-Indian-Sp...

The Four Agreements: https://www.amazon.com/Four-Agreements-Practical-Personal-Fr...

(Note: grew up Christan in rural Scotland now agnostic chilling in Manhattan, so no religious slants)