Welcome to #Nostr

Suggestion:
Follow topics using hastags, click on this hashtag: #rockclimbing, and you will have the option to follow it if using the right mobile or web browser client

If on Android, 

@Amethyst is an excellent choice, feature rich, supports privacy, tiktok like feeds, multi user, supports #Amber (more more security), TOR, private chats, etc.

@0xChat is a good alternative, more like Telegram, including chat groups, channels and voice and video calls, all encrypted e2e. It is powerful with privacy as well, it has secret chats and it supports TOR in the settings "Use SOCKS proxy" (just install Orbot and in the settings be sure it allows background starts you don't need to have it running as VPN)

if on iOS:
https://media.tenor.com/-SP6MqFnCBEAAAAC/but-why-nevermind.gif

Enjoy Nostr!