How long will it take to go from no credit to awesome credit?

I just graduated and start my full time job later this year. I don’t have any student loans because of scholarships and I have never had any type of loan or credit. Basically, as far as I know, I have absolutely no credit history. However, I really want to save up and buy a house sometime in early 2016 if possible. I’m currently living at home so my salary won’t be affected by loans or rent.
I am wondering when I need to get a credit card(secured or unsecured?) and how long it will take to establish an immaculate credit score(720+,760+) for a mortgage? I know the basics of good credit from my research like always paying on time, paying in full, only utilizing 10–20 percent of the credit limit, etc. I really just want to know how long it will take to build awesome credit with these good habits so I know when to get a credit card.
Sorry if I provided too much personal information…I am not sure what all affects credit and such so I wanted to be more detailed. Thanks for the help!