Be advised not every lender will accept a borrower without having traditional credit and a minimum credit score. Although FHA, VA and USDA do make allowances for borrowers like you who have not opened any credit card accounts, auto loans, or personal loans etc. Make sure the lender or broker you choose has a program that allows for no-traditional or alternative credit i.e. auto insurance, rent, and utilities bills. These items can be added to your credit report. Although they will not change your score, it does looks better to an underwriter have these items supplemented on your report.
Best of Luck!