Hey, welcome to the boards. I've been playing for six months, and I'm doing alright. I know all too well that feeling of "Good god, this is harder than I thought." Anyway, here's some tips:

1) Play with the frets and strings at the same time. It sounds stupid, but a lot of people who aren't previously oriented with a musical instrument will just mindlessly strike open strings over and over again and never get anywhere.

2) Do dexterity exercises. By this, I mean moving your fingers around in midair and on the fretboard in as many different combinations as you can.

3) Learn songs you know by heart. Get tabs at tabcrawler.com and learn songs you can hum to yourself.

4) Challenge yourself. After you learn a few songs, take the next step and try to learn something complex, like say something by Tool or Smashing Pumpkins. Floyd fits in there as well. Take a step back, examine the tab/music you're looking at, and concentrate on memorizing each riff.

5) Play new chords every day. Learn them, play them, then repeat the process. Again. And again. And again.

6) GET LESSONS! True, Gilmour never learned the traditional way, but Steve Vai did.

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Lime and limpid green
A second scene
The fight between the blue you once knew
Floating down
The sound resounds around
The icy waters underground