so i just got the panasonic s5ii and honestly i have no idea what im doing. i bought it because i heard it was the best for video but now that im looking at lenses im just completely overwhelmed. there are so many options and i dont understand the difference between all the brands like sigma and the panasonic ones. i just want one lens that stays on the camera and can do everything because im going to japan for my honeymoon in like three weeks and i dont want to be that guy who is constantly fiddling with gear while my wife waits for me.

here is what i need i think:

• budget is around 1000 or maybe 1200 dollars if i push it
• needs to be able to zoom in on stuff far away but also take wide pictures of the streets in tokyo
• not super heavy because we are going to be walking like ten miles a day
• good for video too since thats why i bought this camera in the first place

sorry if these are really basic questions but i just dont want to buy the wrong thing and regret it. is there like one lens that everyone uses for this? i saw a 20-60mm one that comes with it but is that actually any good or should i get something better for a one-lens setup...