Have you tried Electrum[1]? It's a lightweight wallet that doesn't require you to download the whole blockchain. Just select "Legacy" as wallet type when creating a new wallet. Since it's only for a quick test, it should be enough.
Or if you still want to use Bitcoin Core, you can generate a single legacy address by opening the console (Windows -> Console) and using the following command:
getnewaddress("label of your address" "legacy")
[1]
https://electrum.org/#download (the ONLY legit website to download Electrum's wallet. Please double check the URL and
verify the file signature if you decide to use it).
I just tried the code and I get an invalid syntax error. I'm testing Core's message signing option to see if it works without needing to download the whole chain(related to one of the previous thread I posted in).