Hi congrats on you camera! It is a great one!
You can load film in light just not recommended in say bright outdoors, if you need to, find a wall or area w a shadow.
When you get to the end of the roll there should be a little button on the camera that you push, then rewind the film back into the canister. Then when you know it is all spooled up, the back can be opened.
That roll of film, if you exposed to light is probably ruined if you manually reloaded it back into the canister in the light.
Wish you the best with your new excellent camera!
Ask questions if you get stuck. A lot about photography is learning from mistakes. It is great fun! Best!