How can I find ideas to create an e-commerce b2b productized service? Is it a bad idea to "copy" someone else?

Hey guys, this is my first post here. This seems an amazing community to share and find new ideas.

I'm a web dev & designer specialized in e-commerce websites. I would like to try to build a landing page with 1 single productized service. To test things out. I'm a freelancer for over 3 years now, and I may promote first this product to my client base.

Since this would be my very first productized service, I don't plan to build something amazing and never seen before. A simple product would be fine, to learn a little bit from this process. I would just avoid those kinds of productized services that offer 24/7 support because is not sustainable for me at this time.

Is there any place where I can find ideas for this?

Do you think it's a bad idea to "copy" the idea from a productized service and make my own version?