The kanji and the radical are the same, so remembering the meaning of this kanji is as simple as making sure you know the radical for task first! If you know the radical, you know this kanji means task as well.
Today, your task is to eat yogurt (よう). It's nutritious, it's delicious, and I'm telling you to do it, so you have to. A task is basically just something you have to do, so that's what this is.
Currently there are no similar looking kanji which exist in the WaniKani learning system