Clarine, the hue adjustment you are talking about, there are different tools you can use, depending on your preference.
- Adjust > Color > Channel Mixer
- Adjust > Color > Red/Green/Blue
- Adjust > Brightness and Contrast > Curves
For Pic-to-Painting, it was a separate plugin up until version 2020. However, in version 2021, it has been integrated into the program under a different name. You can find the same effects in the Photography workspace (not the Edit that you used for the Bootcamp) and it is called AI Style Transfer (on the bottom)