It's a 6 season Cartoon Network cartoon about a group of kids who attend a summer camp on a magical island with 3 teenage witch camp counselors. First maybe season or 3 the show is mostly episodic and can be watched in any order after the first establishes some things.

Later seasons they really start having more lore and push more story driven narratives ( and even dividing the season into little character focused mini-arcs for one season ) into the picture. Season 6 definitely felt a little rushed ( probably because cartoon network/hbo just wanted the series finished so they could quickly shove it out and then kill it for tax purposes ), but it has some pretty amazing moments and themes later on. For pretty much as much of the series as I can remember, the show doesn't have a bunch of "lol random!" style comedy, so you shouldn't have to worry about that.

One of my biggest gripes is that there's a later season episode I absolutely cannot watch as someone with arachnophobia because it involves one of the main characters and a talking spider. Other than that, it's how the pacing can feel a little rushed towards the end of season 6 ( which I, again, attribute the most likely cause being corporate telling the people behind it that they don't get a season 7 so they better wrap things up as fast as possible ).