I would first self evaluate and see how much you can afford. Then speak to a reputable lender. They will assets your financials and your DTI (debt to income ratio) and will let you know how much you qualify for and your interest rate. I work with a few great lenders. Reach out to me if you need some help.
In addition, we offen give our buyers the attached checklist to get them thinking about what they truly want in a home. This gives us a great idea of what criteria are important and where to begin our search. It also helps us get to know our clients better and how we can help them reach their long term real estate goals.
Best of luck to you with your search--it is an exciting process!