New and need help selecting a mixer

I've decided to work with a vocal coach and take piano lessons and I'd like to record myself at home. I'm looking for a mixer to assist with this. The specific instruments I'll be using are a Yamaha P71 (Same as a P45, but a slightly cheaper made version exclusive to Amazon) and a Shure SM7B. The computer I'm currently using is a PC I built currently operating on Windows 7, but I imagine that in the near future I will switch to Windows 10. I have no desire to switch to Apple, so please do not recommend it. It's helpful if the mixer is also suitable for podcasting with 2 mics.

I'm currently looking at a Behringer Xynyx Q802USB. Can anybody give me some guidance on whether this mixer would meet my current needs or suggest a better option? I am trying to keep the cost at or below $100 as I am just starting out and don't need to go crazy for top of the line equipment before I know it's something I'll stick with.

Thanks in advance!