There are 2 first steps that will get you on your way:
The first step I would recommend is to get in touch with a Realtor. They will be able to help you through the home buying process, and answer any questions you might have.
Second, It would be a good idea to get in touch with a lender or mortgage adviser, and ask to be Pre-Qualified. They will ask you a few questions about your income history and credit score, and be able to give you a good idea of what you can comfortably afford. You should be able to find somebody to talk to at your bank, or you can ask your Realtor to refer you to somebody whom they trust.
I would be more than happy to help you begin the process, or answer any questions you might have. Please feel free to contact me from my profile page, or email me at:
Good luck! Hillsborough is a great town.