Boosting this because it helped me alot navigating this platform. I'm still not 100% used to it but it's been fun so far.
Welcome Home to all the freshly hatched nostriches 💜
Here are two excellent guides to bring your nostr knowledge up to speed:
1. https://nostr-resources.com
By @dergigi​
2. https://uselessshit.co/resources/nostr
By @pitiunited 
Discussion
Yeee if one client doesn’t please you, try another! Damus, Iris, Primal, Amethyst and many more:)