See this helpful guide from the Consumer Financial Protection Bureau on building and keeping a good credit score.
The U.S. Federal Trade Commission (a government agency charged with consumer protection) has a credit toolbox with a large amount of useful information on all aspects of obtaining and using credit.
Visit this guide from the Federal Trade Commission to understand the basics of credit scores as well as how you can protect your credit.
This website from the Federal Reserve Bank of St. Louis breaks down how credit agencies determine your credit score.
See this detailed Nerdwallet page for all of the steps needed to purchase a car.
Edmunds, an online resource for automotive information and reviews, provides this compilation of articles on car buying tips and advice.