Do you want to use #Mastodon on the desktop?
The default website interface is excellent, and there's an optional multicolumn Tweetdeck-style "advanced" mode:
➡️ https://fedi.tips/how-to-activate-mastodons-tweetdeck-style-advanced-web-interface/
There are also many third party desktop apps:
➡️ @tokodon - Free open source Linux
➡️ https://tuba.geopjr.dev - Free open source Linux
➡️ @sengi_app - Free open source Linux, Mac & Win
➡️ @MonaApp - Mac, iPhone & iPad app
➡️ @ivory - Mac, iPhone & iPad app
➡️ @elk - Alternative web interface for Mastodon