Tokyo is easier when you plan around stations and neighborhoods, rather than trying to cover every famous sight. Start with one area that fits your trip, then build outward using the city's rail network.
Choose your base around your days
For a first visit, a hotel near a major station can save time. Check the actual walking route from the station entrance to the hotel: a short distance on a map can feel different with luggage, crowds, and multiple exits.
Keep your first day light
Arrivals rarely go exactly to plan. Leave room for checking in, getting an IC card or another accepted payment method, and learning the rhythm of your nearest station. One neighborhood walk is enough for day one.
A useful next step
Use the Tokyo destination hub to choose an area, then compare it with your itinerary before booking accommodation.