https://www.chess.com/news/view/published-data-api
Writing a chess data application. Need help getting started.

Do you have any experience of using a site's API?
I do not. I was looking into it at the link shared by Nevfy. It seems that things are organized by player so I can access game information like the moves and so forth by looking up a player and getting the png. I still have some digging around to do so please correct me if I'm wrong there.

Correct, game data is contained within player endpoints, so your first task is to decide on which players you intend using?

Correct, game data is contained within player endpoints, so your first task is to decide on which players you intend using?
Sounds like a plan. For simplicity,d I'd like to start by just downloading a player's data and using that as a sort of test case before worrying about accessing the API itself with my app, at least for now. Am I able to do this?

It's very wise to start on the smallest scale & expand from there. I spend most of my time processing team matches rather than individual player data but I think you need to start with a player's archive of available games? Take your own:-
https://api.chess.com/pub/player/jeroenwolfe/games/archives
{"archives":["https://api.chess.com/pub/player/jeroenwolfe/games/2020/05","https://api.chess.com/pub/player/jeroenwolfe/games/2020/06","https://api.chess.com/pub/player/jeroenwolfe/games/2020/10","https://api.chess.com/pub/player/jeroenwolfe/games/2020/11","https://api.chess.com/pub/player/jeroenwolfe/games/2020/12"]}
Then using the first of those monthly archives:-
https://api.chess.com/pub/player/jeroenwolfe/games/2020/05
The PGN's are available in that endpoint for all of your games in that month.
Does that help?

But this is what I think you need to read...
https://www.chess.com/news/view/published-data-api#pubapi-endpoint-games-archive

But this is what I think you need to read...
https://www.chess.com/news/view/published-data-api#pubapi-endpoint-games-archive
Thanks! I think I'm ready to get started you've been very helpful!
Hello chess.com developer community!
I'm currently in a training program for Big Data. For my first project, I'm hoping to write a simple application for reading and analyzing chess games. It looks like I can use chess.com to acquire this data which is obviously the first step, however, I'm not sure how to go about it. Tips for how to begin this process would be much appreciated! Essentially my application will just be reading in chess game data, and organizing that data into a database. It may do other things but that's the starting point at least.
Thanks!