Oh, noob question but how do I check temps and what is normal?
You can check the temps with any number of programs (you'll need to have Windows installed first, of course). A few that I recommend are HWMonitor, Core Temp and RealTemp.
There really isn't
a one size fits all "normal" temp range because of the variables involved (room temp, case airflow, etc.), but in general, with the stock cooler on that CPU, you should idle from 35-45C, and full 100% stress test load should be around 60-70C (maybe a bit higher).