Erm... It's kinda impossible to learn without guidelines. Guidelines are a need in art if you want to learn better. The artistst that are awesome example for KaiserTiger AKA Firestar also use guidelines. And anatomy plays big part as well in it. There are many tutorials out there, and deviantART the most. I would also suggest you to get used to having guidelines, because without them as your support and lifesaver in art... You wont get anywhere.
Here''s one tutorial I would suggest though,
http://www.deviantart.com/art/Lion-King ... -382373333If you use paint, use a blue or red colour for the guidelines, then use a black colour for the main outline, and to erase the red/blue guide after done, use the paint bucket. But also before you start all that, use the pixel pencil tool found nearby the paint bucket.