ways to correct keystoning/ perspective in photoshop elements

I've been using the scanner for little pictures but larger pictures just don't work. I cannot take a square picture so I always have to correct it.
Here are some links for that:

• https://digital-photography-school.com/how-to-fix-keystone-issues-in-photoshop-elements/
• https://digital-photography-school.com/correcting-perspective-in-photoshop-and-photoshop-elements/
• http://www.essential-photoshop-elements.com/straighten-leaning-buildings.html
• http://www.photoshopessentials.com/photo-editing/keystoning/

A lot more messing around than in my old photoshop program but still doable.