Hm... they are ok. I'd suggest steering clear of the effect you used in the 2nd one, not pretty at all
As for the first one.. it's ok, a bit ripply, and the light hurts my eyes but not bad for a start . As for 'sig making tutorial', there isn't such a thing. Instead of making sigs, try and make backgrounds, say 500 x 500 with loads of layers/effects/different lighting then take a section you really like (say 340 x 90, my size sigs) and add images etc to that.