Day 1:

first 4h:

• read readme https://docs.solana.com/developing/programming-model/overview
• understand that everything in solana is an account, both program data and program logic will be separate solana accounts
• read book and setup environment - https://book.anchor-lang.com/

take a rest

second 4-6h:

• read https://www.brianfriel.xyz/understanding-program-derived-addresses/
• follow everything in anchor book tutorial and write all code
• install https://www.soteria.dev/software and try to test your example
• try to refactor your example, break into files

Day 2:

first 4h:

• read soteria blog fully https://www.soteria.dev/post/from-ethereum-smart-contracts-to-solana-programs-two-common-security-pitfalls-and-beyond

take a rest

second 4-6h:

• open 100 different repos here and read through code https://github.com/project-serum/anchor/network/dependents?package_id=UGFja2FnZS0xNzU0MDMwMzQw

Day 3:

• you wake up and can read and understand any anchor project
• try to read any other existing solana protocol and learn about what practices they are using or how they work

P.S. for total newbies, try this https://github.com/ilmoi/solana-onboarding