Hi,
I will re-answer here as you have added extra questions, but I would ask you to please not send multiple separate emails to the mailing list about the same topic.
As Micaela has stated, MDAnalysis welcomes open-source contributions from anyone at any time, if you wish to contribute you are welcome to attempt to fix any of the issues on our issue tracker:
https://github.com/MDAnalysis/mdanalysis/issues
That being said I will note that the MDAnalysis devs don't have the capacity to formally mentor / guide anyone outside the remit of GSoC / Outreachy. We will attempt to offer as much feedback as possible during the pull review process, but we unfortunately just don't have the bandwidth to do much else (especially given we have just finished reviewing a lot of pull requests as part of the GSoC & Outreachy candidate application stage).
Best regards,
Irfan