Preparing my credit for my 1st deal, n how big my lown might be?

[Dakotta Lee]

Im 18 years old, and have watched and read a lot about real estate. Im interested in multi family homes, living in one unit, and renting out the other 3. Im in the process of working for job history. I have a credit card, and a car payment, but i want to know what the best ways to start raising my credit for the best possible lowns, and around what amount of money i would be looking at, if i where to have 2 years averaging 40k a year, and the credit i could acheive in 2 years?