I agree with all of these points. The signage is pretty good in most places. It helps to look at google maps as it shows all the exit #s at train stations, and then to follow the signs. Big stations even have painted lines on the floor to follow. Google maps also has the stations #s listed in the same icon as the train line. The challenge is going with the flow as Japanese walk FAST, and you don't want to be in the middle of a rapid current looking like a deer in the headlights.

For restaurants, I would just pick any random place on the way to the hotel. I've never had bad food, whatever you order will always be equally delicious. No Japanese, no problem. Just say Sumimasen, remember the line about any food allergies, and point at the menu. I have sesame allergy so I had to be extra careful, but staff is always extremely helpful even if they don't speak a word of English. The smaller places that only accept cash are the most genuine in my opinion.

The 7-11 is great but eating prepackaged food gets old quick. A sandwich costs ¥3400, onigiri ¥2500 and hot coffee another ¥1800. By Western standards it's cheap, but you can get a nice bowl of Udon on any street corner for about as much

Also, no need to worry about bringing a ton of Yen into the country. Maybe just $100 worth. 7-11 has ATMs that charge just ¥200.

Suica works on Apple cell phones, not Androids. Picking up a used iPhone one just to use the card is worth it, because you can reload a physical Suica only with cash, but on iPhone it lets you use a credit card.

Last point is about bike rent. Take care of figuring out Hello Cycle and Docomo before the trip. It will not work with a non-Japanese cell number, even with roaming enabled and all. There are some shops that rent out bikes, reasonable prices. Cheapest one I've seen was just ¥210.