Hello Brezina,
Welcome to the SailPoint Developer community!
You can start your SailPoint developer journey by going through Getting Started with Identity Security Cloud.
Read more on ISC/IDN by going through product documentation, Admin guide and connector guide.
Become an active member of the developer community, that will help you to learn, find answers to questions, build solutions and share knowledge. Onboarding guide will help you get started with SailPoint Developer community.
You can also join the Ambassador Program to receive perks, benefits, and community recognition.
Another important place is SailPoint University, where you can join online courses and get yourself certified.