I am trying to make a shape like this:
And so far in Illustrator, I've drawn this:
Now, I know how to make a rectangle/square rounded. Select object, go to Effect -> Stylize -> Rounded corners...
But, when I select them all (except the rectangle) and do this process, it does nothing. Possibly because I've drawn the lines individually.
Can anyone explain and/or advise a way to get them rounded?