Pre-drill holes. That’s pretty much a requirement. You’ll need a drill to do that.

Someone at the small-town hardware store can help you pick out the right screws for your surface materials. Take a picture of your proposed mounting point(s) and bring a bracket that you will be attaching.

Ask the same place how to repair that crack. In the best case, it looks ugly. And you don’t want that. In the worst case, it will fail from the stress. You don’t want that either.