Sorry, I can't log in to discord for some reason. If you can give a short hint I think I can figure this out.
if im right, for the piece bellow you should just use the bottom part of the water tile, now for the piece above, put a water square on the layer bellow, should work. Hope this helps, anything else im here :)
The lake should look like this, so is the stream correct?
Yep, looks like it's correct
tks!
Glad to help!