Hi @Ibrahim_Rasel and welcome in the MongoDB Community !
It’s awesome that you are trying to learn more about MongoDB Atlas. Don’t hesitate to ask more questions in the forum if you need some directions.
Have you tried re-applying the same codes again in the new organisation? That being said, MongoDB Atlas as a generous free tier for all the tools:
- MongoDB Atlas,
- MongoDB Realm,
- MongoDB Charts.
Feel free to test & learn more about these. There is plenty you can do with the free tier already.
Check out the blog posts in the DevHub. Lots of great MongoDB tutorials in here.