new job opportunity... scared!

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So recently I stumbled upon a new job opportunity that I qualify for and am very interested in applying. I'm just so nervous! I've been with my current employer for almost 5 years. They have been super accommodating for me and giving me more work in my area of interest but I don't see myself moving up anytime soon so I feel like I'm sort of suck. 
Pros of my job: security, amazing co workers, flexibility cons: I commute all day long, it's difficult for me to take vacation without killing myself before and after, no promotion opportunities anytime soon. 
Now that I have my daughter I would love to make more money (min of 20k more a year) but I am just so nervous because WHAT IF I actually get the job. The hours would be better too (8:30-4:30 instead of 10-6) Change is scary! Has anyone ever took a leap of faith and are thankful that you did?