Thanks, adzino. I'm using an Electrum wallet. When I open it, I see the wallet name followed by three characters in [square brackets] but I'm totally lost as to where to look for the address.

EDIT: I looked at the "receive" tab, but didn't see anything labeled "address". However, if I look at addresses, I see a list of perhaps 20 "receiving" addresses (the word highlighted in green) followed by a list of perhaps 10 "change" addresses (the word highlighted in yellow). Should I use any one of those "receiving" addresses?

That's the one: Electrum. I followed (I think!) the recommendations and went with that one.

I just started with Bitcoin and it's a bit confusing. Naturally, after creating a wallet, I want to buy bitcoins and load the wallet. The first thing I'm asked for is my wallet address. How do I find that, please? I don't see it immediately when I open the wallet or any of the tabs.

Thanks.