Yesterday I went to Walmart, and one of my purchases was a pair of pedals for my bike. I never knew how they would be installed, but after getting out my wrenches and trying several things, I figured it out and got the job done! I ended up using the adapters that were supplied in the pedal package. Since I got rid of my bicycle shoes, I didn't need the clips that fit the bottom of the shoes.
Note the bottoms of my shoes, those tiny clips which used to hold my bicycle shoes to the bike. Now with the regular pedals, my feet will have good support from the wider surface, even in these soft soled sandals.