applying for a loan these days have changed tremendously, used to be a lender just looks at your credit score and you can get a loan based on how high your score is, nowadays, its more important to them to know if you really can afford the loan, with this said, there are lenders out there that looks at your ability to pay more than your low credit score.
it is valid for you to have a low score since you are only 19 yrs old and have not established the length of time of having a credit yet. but who needs credit when you have cash right?
the same goes for buying a home, go to a credit union, ask about FHA loans, take a conservative route , overtime, your credit score will go up by itself even if you dont have existing loans.