I'll be over Moreton this weekend but when I sail there I usually launch in front of the seaside museum (Blue arrow), cause there is showers and a toilet block which is super convenient. I believe most of the locals launch further down at the red arrow, I believe the water is slightly deeper off the beach? They can probably clarify, but I don't think there are facilities there so I prefer to launch up at the museum.
Pretty much sail in front, there is a weed bank, green area, so watch out for that but it's pretty hard to miss. Wind is cleaner down the bottom, but depending on the current and tide you may want to stay a bit further north.