The more you can learn about how this process/system all works, the more you know about your rights, and those of your children, the more confident you will become. You can start your reading here:
The Supporting Families Experiencing Separation and Divorce Initiative
And some articles on this site here:
http://www.ottawadivorce.com/divorce-faqs.htm
A lot of people here have read/recommend the book 'Tug of War', by Justice Brownstone (a family court judge).
If you are in Toronto, there is a men's support group that meets Weds evenings. Can get you more info if you like.