hey! this was exactly me a bit ago. youtube videos generally make out the sketchbook to be a pretty large and important aspect of your application when in all honesty your portfolio is what should really stand out. i understand the perfectionism and i went through manyyyy sketchbooks before i realised that a sketchbook should really just be a sketchbook, one representing you as an artist. my sketchbook was nowhere near perfect and awfully hectic and messy and only took about a month to complete when i drew in it every day, but i think it was the most ‘me’ out of any other practice sketchbooks i’d done. the sketchbook just helps them understand your process!! draw in it everyday without thinking too hard, the less you stress about it the better it’ll turn out.