Is there any hope for mixing this?

[plingativator]

I have recorded all these songs over the past year, and I still have all the tracks separate. I'm wondering if there is any way to make them sound better, or whether it is too late. I use cubasis vst, so you know my limits. I know I'm not the greatest musician, and these recordings are nothing even close to professional, because I ran everything through my pod xt.

So basically, is it worth keeping the original recordings for better mixing? And how would I mix it to make it sound better?

And here is the site where my songs are: www.15footstick.com/pling

Thanks for your help.