Welcome!

Few things you should know:

1. get a check mark in #Nostr, there are few options, I suggest nostrcheck.me, once you get it, edit your profile and update your Nostr-Address, not having it will hide you in some clients

2. follow hashtags, a good way to find like minded people

3. think of your nsec as your Bitcoin private keys, act accordingly

4. chose a client that respect your privacy, meaning, you can sign in with a Signer protecting your nsec, it has TOR built in and above all, you can manage the relays you use. I suggest @Amethyst

have fun!