Consider swapping the locations of the pantry and powder room -- doing that will enable you to put a short solid wall at the end of the peninsula with your bath room door in "hall" across from that wall and enable you to put the window to the bath on the side of the room rather than facing the front next to the foyer, and It will also enable easier access to the pantry from your kitchen by putting it closer.

Go ahead and put a roof over the area behind the foyer and create a porch that wraps around the back wall at least to the point where the kitchen meets the dining space.

If you swap the location of fixtures ( except tub) in the bath adjacent to the back (?master?) bedroom, you could put the door from the hallway to that bathroom within the wall but adjacent to that back bedroom. Then you could put another door to the bathroom directly from the back bedroom to that bath using the same corner space within the bath for swing room for opening both doors into the bath.

Instead of just a front stoop, go ahead and add a porch in front of the bath and pantry with its front wall even with the front wall of the front bedroom.

Add a second window to that front bedroom.

Let us know how your project goes.