Help with an idea, and where to start.

First off I am not sure if this is the right subreddit, and I apologize if it is not. I am looking to automate filling out forms on websites. For instance let’s say I have website A, B, and C and I need to input pretty much the same information into each website. I want to have something where I have a predetermined set of questions that encompasses each of these websites. Press go… And the program fills out forms on all 3 websites. Essentially running a script to jump between each website, and place the info where it needs to go. I’m looking for a way to do this without dealing with API’s. I’m thinking almost like an auto clicker script. Thanks in advance for any help.