Welcome @zahira to OpenMandriva community and this forum.
OpenMandriva contributors are a small group of unpaid volunteers. Our development platform is called Cooker. There is more about Cooker here. The OpenMandriva wiki home page.
A lot of us got started by helping other users in this forum and writing articles or How To type of articles that become part ot our Forum/Resources Index.
Information about Release Plan and Repositories.
You are welcome to ask any questions here or in our Chat (Matrix or Telegram) channels. The chat channels may receive answers sooner but do be aware people are in different time zones so be patient and someone will answer.