Initially you will probably be selling fiber optic installations, splicing, troubleshooting, preventative maintenance and restoration services. Make sure they know you can fill any fiber requirements they might have. Talk to your suppliers also, and ask them to refer you. Let other contractors know that you will willingly take on any fiber projects they might not want to do. Many will welcome your offer.
Help is out there for the asking.
They do want you to succeed. Now that your feet are wet, and hopefully you made a small profit, the next step is to go for bigger jobs. Your contact list is building as well as your resources and confidence. Take it a step at a time, but take these steps. When you complete a job, sell the customer a maintenance and restoration contract.