MongoDB backup and restore process


I have a MongoDB cluster which is in active passive mode and is on premise. I am working on a backup and restore strategy of the whole setup. Can anyone please let me know what should be the industry standard process to do this?

Data Backup: I want to take an incremental backup of the data.
Data restore: Want to take point in time restore.

Just to let you know that, I am following the MongoDB Ops Manager documentation, however not sure of how to exactly implement the Backup and restoration of the Database(s). It would be really helpful if any step by step process can be given.

Would really appreciate if anyone can help me in this regard.