so i just got the new sony zv-e10 ii because i want to start making travel videos but honestly im totally lost with all these numbers on lenses. i see people talking about 16mm or 35mm and f-stops and i have no idea what any of that actually means for my footage. the kit lens it came with is fine i guess? but i want something really small that i can just throw in my backpack when i’m walking around tokyo next month. i dont want a huge heavy thing hanging off the camera.

im looking for something that:

• fits a budget of under $500 if possible
• is really lightweight (i hate heavy gear)
• works good for filming my face while i walk and also some food shots

sorry if this is a dumb question but do i need a specific brand or can i use other ones? i heard sigma makes stuff too but idk if it fits the sony mount. i just want something that makes the background look all blurry and pretty without being a giant brick. what should i even be looking for?? maybe like one or two lenses that are easy for a beginner who knows nothing lol...