Hypothetically, If an American foreigner is looking to visit Tokyo, what might they be able to do without seeming like a stereotypical neckbeard or be culturally disrespectful?

Hi, I'm an American and I've always wanted to visit Japan, maybe even more there, but I've heard horror stories of tourists being extremely..... American for a lack of a better term. Their expectations being like that of an anime or manga, don't get me wrong I do enjoy such things, but that isn't my entire reasoning for want to visit. I've always been interested in the culture and the people.

I'm just looking for tips and guides for what I can do to not be a stereotypical American tourist. Including what tourist traps to avoid as well as lesser known tourist areas. Anything would be much appreciated and thank you for your time for those who choose to answer.