Welcome my friend. 
I recommend this intro peace on NOSTR by nostr:npub1a2cww4kn9wqte4ry70vyfwqyqvpswksna27rtxd8vty6c74era8sdcw83a   It will give you all you need to fully leverage decentralized social media or “Notes and Other Stuff Transferred by Relays —NOSTR” for short. 

https://www.lynalden.com/the-power-of-nostr/