eli lev-
I suggest you google “cassette to mp3”.
The hardware prerequisites will remain the same.
There are many software packages, free, shareware and commercial, that will have the same approximate functionality.
If the number of steps is intimidating you may want to get something that does it all for you (breaks up the songs and creates the MP3s).
This is a common task, and you will find lots of “how to” advice out there.