@2DLenzy
honestly, having a model sheet is actually understandable and I personally support and implore that people made them, sure, you should know how to draw them without them, but there's no shame on checking for details that you're not sure of. In my case there's a point I completely forgot that Larry is supposed to wear his ring, although then I decided that bewteeen chapter 2 and 3 he actually started having it as a necklace.
But still, make the model sheet, analize what eyes you'd like them to have and, optionally, make some study to make chibi eyes for when they're far away or too small in the panel. It helps a lot if you struggle with eyes, intead of waste too much time making good eyes every panel, there's some on which there can't be that much detail.