How to fill a new orientdb database by data

Hello, i am novice to orientdb.
My question is:
Is there any link or just help to learn how to fill a new database newly created by orientdb. Thanx gor help

I would start by looking at the documentation for the ETL tool.
It has several examples of loading data.

https://orientdb.org/docs/3.0.x/etl/ETL-Introduction.html

If you want to move data from RDBMS over to OrientDB then take a look at the Teleporter tool.
https://orientdb.org/docs/3.0.x/teleporter/Teleporter-Home.html