So I finally bit the bullet and bought the Fujifilm X-T5 because I loved how the silver one looked and everyone on TikTok says the colors are amazing but now that I have the box sitting here I realized I didnt actually buy a lens for it and I am completely lost looking at all the options. I am sorry if this is a really basic question but I honestly dont even know what the numbers mean or why some are way more expensive than others when they look almost the same to me.

I really just want one lens that stays on the camera all the time because the idea of carrying a bag full of glass and switching them out while walking around sounds like a total nightmare and I am honestly scared of getting dust inside the camera body if I open it too much. I have a big trip coming up to Japan in about two months and I want to be able to take photos of everything from the narrow streets in Kyoto to the food I am eating and maybe some nice portraits of my girlfriend.

Here is kind of what I am looking for:

• Budget is around 800 to 900 dollars max since I spent so much on the camera body already
• Needs to be good for travel so not super heavy if possible
• Something that works in low light because I want to take night photos in Shinjuku
• Easy to use for someone who mostly just used an iPhone until now

I keep seeing people talk about primes vs zooms and I think I want a zoom so I can see things far away? But then someone told me the prime ones make the background blurrier which I really like for portraits. Is there something that does both or am I asking for way too much? I saw a 18-55mm one and a 16-80mm one and a 18-120mm and my head is just spinning with all the different versions. If you could only pick one do it all lens for a beginner who doesnt want to carry a backpack of gear what would it be? I am really trying to learn but right now I am just staring at a very expensive paperweight...