Trending @Infosys; Beginner in Storage & Backup Technology - Dell Vendor

Hey everyone, Is anyone here experienced with SAN, Dell EMC Avamar, PPDM, or Data Domain? I'm looking for beginner-friendly study notes. Can anyone provide the hand notes or something that is helpful for beginners in Storage & Backup, mostly into Dell EMC Vendor

I'm looking for some guide in learning Storage technologies - PMAX, UNITY, ISILON, SAN, NAS

Backup technologies - Avamar, PPDM, DATA DOMAIN

I'm covering dell provided documentation, but still it would be helpful if any other suggestions.

BUT PURELY I'M A BEGINNER INTO IT FIELD