Hello Jared,
Welcome to Biggerpockets!
The first place to start is to attend Real Estate Investment meetings in your area. Look on line for them in your area. They usually meet once or twice a month. In addition, think about what venue of real estate do you want to invest? Do you want to fix & flip? Do you want to buy and hold? Do you want to work with parners to invest in commercial properties? Once you find out what kind of real estate interests you, is when you can effectively start to plan.
If you want to start with a multi family unit, then make sure you study the numbers. Study the 2% rule, the 50% rule, and the 70% rule. These three rules help you to determine whether a property is a good deal or not. When purchasing any property, there will be fixed expenses, and one time expenses. Make sure you calculate all the expenses to determine if you will have cash flow or a profit. The fixed costs are, (1) property taxes, (2) water bill, (3) insurance, and (4) most important the mortgage. The future costs are, (1) vacancy, (2) maintence, or (3) major repairs (replace roof or concrete). The Holding costs to calculate are, (1) repairs to bring the property up-to-date, (2) utilities until it's ready to sell or rent, (3) insurance until it's ready to sell or rent, (4) closing costs, and (5) property taxes.
Once you become familiar with the real estate language and study your numbers, is when you will be ready to make your first deal in real estate investing.
I strongly suggest attending the Real Estate Investment meetings. They will help you connect with seasoned investors, and your youth is an advantage because seasoned investors will want to share their knowledge with you.
Hope that helps you.
Melissa