If you have the freshman/junior Halliday-Resnick stuff down I'd suggest jumping right in. Susskind's Theoretical Minimum (https://theoreticalminimum.com https:/

If you have the freshman/junior Halliday-Resnick stuff down I'd suggest jumping right in. Susskind's Theoretical Minimum (https://theoreticalminimum.com https://theoreticalminimum.com) is excellent, he has a lot of videos online. I'm using the book version (https://www.amazon.com/Theoretical-Minimum-Start-Doing-Physics/dp/0465075681 https://www.amazon.com/Theoretical-Minimum-Start-Doing-Physi...) for self study.