First season isn't bad, it's a little more grounded in reality. As a person who watched it when it premiered, it was something new and wild, but it's definitely tamer, and also as someone mentioned, does not have the craziness of Danny Devito.
Danny devito is missing which leaves the season with less of their crazy energy. Also they started as a very small production with little money and I think that shows more in the first season.
Anyways, you can start with the first but just know that the show changes somewhat afterwards, it get's better.