how can i have a good with a the right arm broken?!

You can try writing with your left hand, since you have time, you can try and maybe you develop your writing skills enough to be able to write with both hands well.
As other people said, you can google whatever thing it comes to your mind, or search it on youtube, you can talk by phone, I know that the first days after a broken bone are really hard, I broke my leg and I have to use crutches, I have made some questions here, I have to go back to school with the cast, if you want to pass some time and avoid boredom, you can write me a message or I can leave here my email in case you want to chat, heymark11@yahoo.com
Good luck with your arm, get better soon

Right now it is important to rest your arm for a few days. Pretty soon you will be able to do Alot of your normal actvies. In the meantime while you are stranded at home, TV, reading, 1 handed computer, talk on phone, try to learn about something you have wanted to know more about something you are interested in like horses, baseball stats, horse racing clothes, pretend shop on line (look but don't buy) or whatever. Search out all you can on the web. Try and have fun!