Contact lense people!!!?

So yesterday I picked up my first order of contact lenses. I'm planning on talking to my eye doctor later on today, but I have a few questions to run by people who have worn contact lenses before. So, during my trials, the doctor gave these "multi-focal" contacts. They act similar to how bifocals work, meaning that they would be great for distance but when I need reading gles, they would also be perfect. However, during the trial it always came out blurry and made me uncomfortable. I think those shouldn't have been my first pair seeing that I'm only a beginner. My doctor switched me to another brand, and everything is clear. However, she said these contacts don't work like reading gles, but more for distance. I plan on using these contacts for high school. I won't have trouble seeing the board, but my doctor said that since I'm far-sighted, I have slight problems with close reading (doing homework for a long time, etc.). She gave me reading gles to use that I could wear while still wearing my contacts. My question is, do all people who are far-sighted and wear contacts, have those special "multi-focal" contacts, or do they just use the plain contacts and wear reading gles over them? How much time would qualify as long enough for me to have to put on my reading gles?