I’ve made a new cover, which I sincerely hope is a great improvement on the old one.
If you are producing an ebook, then you can either make your own cover, or pay someone to make one for you.
One option is Microsoft Publisher (this is more sophisticated than Microsoft Paint).
Or, if you use Amazon or Pronoun, you can use the provided services (whether their own or third-party, as applicable).
You can find images online to use.
Here, I’m using public domain images that are OK for commercial purposes.
But what about Volume II? Have a look in five minutes!