Building credit to get a loan for rental properties

[Account Closed]

I’m graduating from Highschool next year and want to buy my first rental property within the next 3–5 years(maybe less but that is doubtful). 

I currently have no established credit. Would starting with a credit card (used responsibly and paid in full monthly) be the best way to build credit for an investment property loan?

Also, for someone just starting out, what would you focus on first? I’m trying to build a strong foundation early and would appreciate advice from those who started young.