Usually we don’t really help out with planning issues. It looks quite okay allready, but do you want to walk through your living room to get to the shower? I would start with getting the best layout of rooms & doors(spaces and movement), windows (light & view) then start on interior planning.
But make some copies of your design (from the menu under the floor name) and start making variations.
I would try to share your plan on facebook (sharing options in the top right) to ask for advice