You can connect your Wix website to Spark using Wix's HTML iFrame Widget.
Wix is a "Do it Yourself" type tool, so for things like this it requires you to know how to do some coding work, know CSS to make things look better, etc.
I always recommend, for best results to use a professional martial arts specific web design company, it will pay for itself, and save you a lot of headaches if you are not a designer/programmer.
Ignite offers free websites (and are amazing!), when you are ready to take it to the next level in results.
Wix help article: