I too am very much a beginner. I completed 3 scarves as christmas gifts all in garter stitch and they were wonderful!!
thoughts on all garter stitch:
You can buy some yarns that look beautiful just simply garter stitched. I used patons tweed series of yards with 10 needles and just knit away as I took the bus to downtown each morning and it was hugely successful. I really like garter stitch. Wish I pictures of the 3 scarves that were so awesome.
Right now I'm working on a "mistake rib" scarf which is a knit two purl two pattern and there nothing to keep track of. Cast on 19 stitches. K2 and P2 until you get to the end, there will be 3 - knit those 3. Repeat. Makes a fun ribbing but it will indeed curl on you.
garter stitch edge:
I've figured out that you can give any scarf (I think?) a garter stitch edge if what ever you do to begin the scarf is exactly how you end it too.
So say you want stockinette stitch of say 20 stitches. You can cast on 26 and then always do the first 3 and last 3 as knit stitches. Or cast on 28 and have the first 4 and last 4 be knit stitches. You can use any number so long as what ever you do to start you work is what you do at the end. Maybe someone who is a more seasoned knitter can confirm this?
A stockinette scarf pattern:
^ hope that works.
^ click on basic scarf at bottom. I've thought about trying this scarf. It looks like you're essentially making blocks around stockinette to avoid the curling, and so I think this would be a great way to make a very easy stockinette (mostly scarf).
Good luck! I hope you'll post back again because it is so nice to hear from another absolute beginner. At this point I can purl and knit but I've never yarned over and I have not a clue about inc and dec.