Beautiful picture and very artistic, I can't believe you are just learning the program you look like you know what you’re doing. I have Paintshop Pro and the way I learned to use it is just take a sample picture and try all the different things on it. I learned the most while trying to restore all photos. There's a page on the Corel site with video instruction:
Video Tutorials - PaintShop. Also, the help in the program itself is very helpful. If you want to know how to do a specific thing, you can often google it along with the name of the program and there is often advice on u-tube. Good luck with this, it can be very rewarding hobby.