Creating a Project from scratch: need square one and roadmap

Hello all,

In my new coding adventure I am trying to create projects that make my life easier. One of these is acting. For those unfamiliar many actors submit themselves on job boards much like you would use linked in.

You click on a job, a pop up screen comes up to pick your headshot and then hit the submit button.

How could I automate this process with a script once a day or ideally automatically on one or more websites? Any project links or guides would be helpful and maybe this is a big stretch for a newb so if someone wants to be my shaman I’m open.

I coded a small js script on linked in once to add people to network but idk if java is the best for a pop up window. Send help