Young investor trying to get a loan approved

[Christian Kim]

I'm looking to buy a house soon. I have the down payment and all. However, I'm 24 with a credit score of 731. I'm afraid I won't qualify for a conventional loan on my own because I don't have that long of a credit history. My parent's aren't an option as co-signers. Should I get a pre-approval on my credit alone or try to find a co-signer? I didn't want to hurt my credit for no reason. Help an eager young entrepreneur out!