Uhm... keep your throat lubed... when I used to do vox for this blackmetal band, I used to drink a couple swigs of milk before the set... I've heard a couple bites of banana work the same...
other than that, use your diaphragm and just fuckin do it.
I dont have such a bad vocal, but the only thing I have recorded was that song "Echoes"... our bassist used to do the part, but he was sick and so was I... hence the distortion... you could also try that... a bit of amplitube on vox gives it a bit of grit... dont overdo it like I did, though... lol
Wow that sounds fucking awesome even if you had been singing for years! nvm a first attempt!....maybe this has boosted my confidence in the fact I might have to sing sometime soon for the first time