ive been learning to make cc and i have everything down, i just hate texturing ugh. idk if its because of the restraints of the uv map sizes or what but areas never want to fill in all the way, leave behind small blank spots ect. its only when im working with cc sizes, so im wondering if theres some trick to it? if im doing something wrong? please help cause id love to get back on track with my cc

Because this object doesn't have any transparency, the texture doesn't need to have it either - which will allow you to use all that extra space for 'bleed', areas of colour that go beyond the exact UV map to make sure no pixels are jagged.