So I just got the Panasonic S5II and I am honestly so lost with all the lens options out there. I bought the body by itself because I heard that was smarter than getting the kit lens but now I have a camera I cant even use yet lol. I am a total beginner like I barely know what an aperture is so please talk to me like I am five. I am going on a trip to Italy in three weeks and I really just want one lens that can do it all so I dont have to keep switching things out while I am walking around. I want to take pictures of buildings but also maybe some people or food?

Here is what I am looking for:

• something that isnt too heavy because I will be carrying it all day
• budget is maybe $1200 max but I could go a bit higher if it is really worth it
• good for both photos and video since I want to vlog a little bit for my family
• something that zooms a decent amount so I dont have to get super close to everything

I keep seeing stuff about Sigma and Panasonic brand lenses and I dont know if they all fit the same or if I need an adapter or something? Someone mentioned a 24-70 or a 24-105 but those numbers dont mean much to me yet. Which one is going to be the easiest for a newbie to just leave on the camera and forget about?