I'd not get too hung up on Wavepad. Get it recording first then work on getting the app of choice working.

Here I can use some USB Soundcard (examples at https://www.amazon.com/Best-Sellers-Electronics-External-Sound-Cards/zgbs/electronics/3015427011 ) if the audio jacks on the laptop doesn't work out.

Then for software I try Audacity since it's free and plenty of forums on its use.

I'm not there to see all the menus and more of the software so I can't see if there's a choice not tried.