Please help!

First, you should have cool pictures to share with the community. Pictures need to meet certain quality standards and the subjects should make buyers interested in your pictures. Stock photography is not to unload any snapshot in the hope of making a lot of money. Your starting expectations should be modest. It's a great opportunity, however, to make some cash in addition to any activity you have. You do not need exceptional good equipment, but please note that if you submit cell phone images, the quality expectations are the same as those from high-end camera owners. But at the end of the day: the pots do not make a good cook.

Some reading points to you: you should consider these resources: https://helpx.adobe.com/stock/contributor/tutorials.html
Please read the contributor user manual for more information on Adobe stock contributions: https://helpx.adobe.com/stock/contributor/user-guide.html
See here for rejection reasons: https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
and especially quality and technical issues: https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html

Try here:

https://helpx.adobe.com/de/stock/contributor/tutorials.html