Hello.
If you are new to Dynamo and looking for a place to start, give the Dynamo Primer a good read and try out some of the exercise tutorials on this website. After that, I am sure there are some threads relating to batch opening files. Try the search function to find more.
When you feel ready, give your idea a go. We can help you with specific problems or info when you need it but we can’t do the whole thing for you.