Most of the people you follow who mention Mastodon will include a link to their page. The results will be in chronological order if you click the "latest" tab. I found a few of my friends on the social networking site.
There are other search terms you can use. It is possible that others will spell Mastodon as "Mastadon". If this isn't a fleeting thing, make sure to check in a month or so.
There are services that can find accounts.
If you don't like what you see, there are a few services you can try out. The first one allows you to sign in with your social media accounts. You will get a list of people who have also signed up for both services. I don't think this service will surface anyone who didn't paste a link to their Mastodon profile on social media, but there's no reason not to try.
Some people on the social networking site add a link to their Mastodon page to their bio. They can be found on Fedi finder. You can see any Mastodon accounts in the app even if they are on a different server. I've found a few people this way.
You can find other interesting people to follow.
Most of the people you follow on social media don't have a Mastodon account. For now you need to find some new people to follow. There are a number of ways to do that.
The first thing I would do is follow the account that recommends new people to follow. Fedi. directory is similar to Yahoo's directory in the late '90s. You can look at an index of accounts that interest you. The site Trunk has lists of interesting accounts. There are a lot of interesting accounts to follow.
Linux would be similar to Mastodon if it were a social network. I mean it as a compliment, and some people will think it is an insult. The internet is becoming more and more corporaized. It is refreshing to use a service that has not been A/B tested to death. I want to keep posting links to my articles, but I think I will shift more of my scrolling to Mastodon. Should I join you?