Sorry for not replying and thanking you and Jack sooner Spurs. I found the recommended SSD at our local Best Buy in stock and on sale for $90. As you said, the instructions were perfect and I can't believe how much faster my computer is and I'm so sorry I didn't do this sooner. I've almost forgotten what a beachball is as I haven't seen one since connecting the SSD.
I did have a couple of hiccups though. Pressing and holding the Command & R keys at startup wasn't working, only the regular screen would come up. An internet search brought me right back here to the community and the suggestion to use a wired instead of wireless keyboard. Luckily my wife had one that I plugged in and was all set to get started. That's when the second problem showed up, there was no Command key on it.🤦♂️
Back to the internet to find out that the Windows key was the Command key and from there it was clear sailing.
Thanks again to all here who share their time and experience with us.