Hmm, is it lyrics you struggle with, or the music? Or even both?
I think we've all been where you are, mate. That frustrating feeling that you can't make progress, that maybe you're not really THAT good at this. I know I have, and not just with song writing.
My advice to you bud would be to look at things differently. Instead of thinking "I haven't managed to write a good song", say "wow, I've written a great verse I'm proud of!". Write that verse down somewhere. Record it if you can. If you like it, then its precious and worth holding onto. Who knows? Maybe you'll come back to it in the future and have an epiphany, and chorus, melody, solo, everything will just 'click'.
And if it never does? You've still done something YOU are proud of.
When I first started seriously writing again I got so frustrated and full of self pity that I wasn't amazing at it straight away. Took me a while to realise writing is like being good at sport. You do a lot of seemingly pointless training for one short game.
Stick at it dude, it'll come in time. And the forum will be here to help you
Peter
P.s. be careful using terms like noob. Some of the forumites are old hands and won't know the lingo *cough*Kafla*cough*