Can you give me some tips on how to get into contributing open source projects (e.g. on websites like GitHub)?
For your first contribution, you should plan to make a small change or fix(such as a spelling fix or a uncaught error) that will be easy to perform and for someone else to review. Before contributing to an open source project for the first time, its a good idea to check if the project has a contributing guide. If it does, make sure to comply with it over any specifics given here. 

1. Identify the change you want to make. Look at the issues for ideas, or create an issue with a brief description of the issue. Your first one should be simple to help to learn how to make them. 
2. Fork the project.
3. Clone the fork of the project you made.
4. Create a branch named after the issue you want to solve and switch your working branch to that one.
5. Fix the spelling mistake or simple bug
6. If there are any pre-commit checks, perform those
7. Commit your code. Indicate that you have solved the associated issue.
8. Push your code. It should appear as it's own branch in your fork of the source.
9. Submit a Pull Request (PR) for your fork, indicating the issue it solves in the PR.
10. A project maintainer will reach out to review your PR and review your code. If it is satisfactory, they will merge it in. If there are any issues, they'll give feedback on what you need to do.

Overall, contributing to open source software is fun and easier than many believe. Large open source projects may seem intimidating from the outside, but they are often the easiest to start contributing towards because they have the most active maintainers.
Thanks, and is there anything I can do to make my pull-requests have a higher chance of being accepted?