Few Questions

I would like to ask if I am using the product type → Variable products cannot directly use the variant function. I tried to set the attributes first. I first added “2 colors + 2 sizes” to test whether the variable products will display the main product. , but the product has not been displayed below the arrived product. Are there any steps to deal with this?

. Unable to activate, it keeps asking me to activate, but activation keeps failing.

. If I have something I want to link to this form, can it be customized?