I just got a Sony a6700 and I am so excited!! I’ve only ever taken photos on my iPhone but I’m going to Tokyo next month and wanted to upgrade. Problem is I have zero clue what I’m doing with these lenses... there are so many numbers like f2.8 and 18-135 and it’s honestly super overwhelming. I just want one lens that can stay on the camera the whole time since I don’t want to carry a bag of gear around. My budget is like $800 max for the lens part. Is there a good do-it-all zoom lens that works for everything from street food to buildings? Sorry if this is a really basic question I just don't want to buy the wrong thing...