I think considering your not a web designer that it's not a bad effort and gets the point of your site across to customers. Its not like you are selling your web design skills, its an electrical company and I am sure you customers would not judge you on your site. Good Work Caltech
As a beginner, the site looks good. That's a good start...
The design is simple but it's easy to navigate...
I just want to suggest to expand the width of your site. I think that will look better and you can have more space to add some aditional details to your site. Try also to change your color scheme to make it more appealing.. Honestly, the color of your back ground doesn't look good...