Hey there.New guy here

I'd like to offer an affiliate program on my site but I'm not too sure if it can work with ClickBank.

I offer a service and it's not automated, meaning once the customer pays,the service doesn't start instantly. I have to manually enter the info and then the service starts.

I'm actually a middle man,that's why I can't just use a script to do all the work.

Would I still be able to use ClickBank for this?
I'm still researching other places. I just wanna know what my options are.