I've used PSP since v.2 (back in early to mid 1990's) - it has "grown up" since its early days as a simple graphic editor. One of the things I suggest is creating your own workspace and saving it. You can open "customize" (under "View") and drag tools that you use often onto toolbars down the side, across the top or bottom - you can create new toolbars and then add the tools you most often use (so you aren't always having to go up to the menu to find and click.
I use selections a LOT - like a clipping mask in that you can create a selection (a shape or from an element or text), then save that selection to the alpha channel. As long as the document is open, that selection can be loaded into any document. (Say I saved a star shape - I can load selection from alpha in another document - a photo or a background - then copy it and paste it into the layout I'm creating.) Clear as mud until you do it a few times - there's a lot of good tutorials on using selections, I'll look some up and send links. There's also a LOT of help within PSP's help menu!! And at Corel - there are tutorials.
I took LVS courses for PSP and Corel Painter - I'll review my files.
. . . Pam