This is totally up to you and what you are comfortable with. I usually don't call home except for once every couple of weeks for short updates. However, my roommate last year would call home nearly every day and it was her second year here. It really depends on how close you are to your family and why you want to be calling home. If it's something you like to do, then go for it. There is no one here stopping you, and it's always good to keep in touch back home to keep a good support system while you're away.
Call home as many times as you want! I phone my mother every day. She's like my best friend, so I have no shame in calling her everyday. I call my dad about one or two times a month, just to let him know I'm doing well.
We want you to have the best college experience, so Plus-U moved in with Unigo. You're now part of the most extensive college network on the planet, with incredible resources to help you at every step of your journey.