No problem Bonnie. I can feel your excitement as you count down the 42 days before departure. Easy city to explore on foot and a lot can be seen in day depending on your stamina. All about pacing and for me, enjoying a pint along the way. Have no clue which neighborhood you are staying in but here's a fun way to begin your London stay. Get to your accommodation, check in, unpack and head back right out the front door. Locate the nearest tube station and take what ever line or lines you need to get to the Westminster stop. The big map on the wall will help. Exit at Westminster, Mid The Gap, and follow signage to EXIT 1.
If memory serves the EXIT 1 sign says, Westminster Pier, London Eye, and Westminster Bridge. Walk out the exit into the light. WestmInster Pier will be in front of you with the London Eye across the river to your left. Westminster Bridge on your right. Turn right. Look up. Smile and let your London adventure begin.