In addition to YouTube, watch and talk to others...
Learn these basic knots and it's going to cover 90% of what you'll need.
- Polamar knot
https://www.youtube.com/watch?v=uWw_f7CQQLg used to tie on hooks and lures
- Snell and loop knot
https://www.youtube.com/watch?v=BPI4rcDi1iE used to tie on hooks and make loop end. One advantage of the snell is the knot will not spin on the eye of the hook and will pull the hook straight when setting the hook.
- Improved Albright or Alberto knot
https://www.youtube.com/watch?v=Rs4Wdoc8-0o used to join 2 lines together.
- Dropper Loop
https://www.youtube.com/watch?v=N3cGhPWRJI0 used for high low rigs.
