A contribution guide on how to contribute to the Arcane Algorithm Archive (AAA) can be found on this Wiki page: https://github.com/algorithm-archivists/algorithm-archive/wiki/How-to-Contribute
The community member Buttercak3 also created a video series, explaining the contribution process of the AAA. You can find a playlist with all videos here: https://www.youtube.com/playlist?list=PL5NSPcN6fRq2vwgdb9noJacF945CeBk8x