You tube

1. Take u forward

2. Tech dose

3. Abdul bari

4. Code with harry(only for basic understanding of dsa)

5. Codehelp - by Babber

6. Pepcoding

7. WillianFiset (only if you want to go in depth)

8. Luv (for those who want to start with competitive programming)

9. Algorithms Made Easy(leetcode problem solutions discussed here)

Courses

1. Coding minutes

Websites

1. GeeksforGeeks

2. Takeuforward

3. Programiz

4. Javapoint

5. tutorialspoint

Coding Platforms

1. Codeforces

2. Codechef

3. Leetcode

4. Interviewbit

5. hackerrank

6. hackerearth

7. CodeStudio

DSA Practice Sheets

1. Love Babber

2. Striver

3. Fraz