The very first item I knit was an afghan. At the time I didn't know what I was doing, I had a book with pictures on how to do the knit stitch sitting next to me in case I forgot what I was doing.
I CO 40 stitches (in homespun, I know ack!)
I knit 50 rows, added another color, knitted 50 rows, and so on, until it was taller than I am (I'm 5'2", the pannel was 6 feet)
then I did it all over again, alternating colors, and again, and again. Then I sewed the pannels together (no knowing if that was how you made an afghan) then I crochected a one row border around the entire afghan (which ended up fitting a queen sized bed).
Then I promptly gave the blanket away. Sheesh.
I think if you are someone who can stick with something, and aren't easielly distracted and afghan can be a good project for a beginner. I'll tell you, by the time you're done you have the knit stitch and your tension down to a science.