To reduce unallocated Space of data file

Hi,

Please help me on the below :

Our ETL process load data from Flat File > Staging DB > DataWarehouse.

During Full load, the staging Database size grown to 1 TB. Delta loads are happening without any issues. But, we have reached space limit provide for our project. So we verified the unallocated Space of staging DB data file which is 95%(~ 950 GB). We want to shrink the Data file/Database.

Is it good to shrink the Database ?

After shrinking the Database If we do full Load again, will there be any performance issue due to Auto growth of the Data file ? (Kindly note that we will do Full Load once in 3 months)

Please let me know is there any other way to handle the staging space requirement effectively.