A Nifty-Fifty is a very versdatile lens and I always recommend to get one. In the video I will tell how I have used it and for what kinda of photograhy.
I have also a video about the Standard lens in general.
I said in the video that the price is around 350,-, but it seems that you can get it a lot cheaper.
This is a question that I hear a lot. When you start to get more into photography the lens that came with the camera might not be enough for you. I made a video about the things you should consider when buying your first lens after the kit lens. Of course this video will help you to decide even if you are more advantaged photographer.
You can get any of those lenses from my kit.com store. (disclaimer: I get a few bucks if you buy from these links.)
The link to the store: https://kit.com/PeterF/next-olympus-m-zuiko-lens-after-the-kit-lens