Hello @migdinny
Welcome to the OpenMRS community!
Here are some resources to help you find your way around.
Getting started - https://wiki.openmrs.org/display/docs/Getting+Started+as+a+Developer
Using git - https://wiki.openmrs.org/display/docs/Using+Git
Sample Sprint - https://wiki.openmrs.org/display/RES/Reporting+Sprint
Sprint announcement - Sprint 9 Announcement Overview
Sprint List - https://wiki.openmrs.org/display/RES/Sprint+Schedule
Pull request tips - https://wiki.openmrs.org/display/docs/Pull+Request+Tips
Developer Guide - https://booki.flossmanuals.net/openmrs-developers-guide/support
Also, feel free to reach out to the community for clarifications on any challenges you may encounter.