I think you have to give it time. There are not really any default tags you follow (except the newtohubski one) and you don't know persons you like yet, so you don't really follow any specific people. Once you have a couple of tags you like and people you find interesting, you can follow them and see what they write and share, etc. and soon the stuff on your main feed will be interesting and plentiful for you.

But you should be aware that niche topics here move with a much slower rate than on reddit. Sometimes it's enough for me to only stop by here every two weeks and see what's up and what I might have missed. Other than that I check it maybe once daily. You can't really spam F5 here like on reddit and the frontpage looks totally different than 30 minutes before. New stuff comes slower, but that's due to the smaller userbase and the more well-thought content. But even that requires that you follow certain tags and users, and neither of them you know yet after only one day.

Also, as a couple of people mentioned in the plenty reddit welcome threads: this site might not be for everyone. And that might be the case for you. If you really wanna try it out, though, you have to give it some time. If nothing interests you by then, this website might not be a reddit replacement for you.

PS: Pretty sure that people who are more involved here can show you quite a lot thoughtful and interesting discussions and articles.