I am new to Planet Minecraft but not making skins. I have been making them for about 2 years.
Where I get my inspiration is colors. So, for instance, if I use orange I typically think of Halloween or a pumpkin. With cyan I think of a snowflake or water. For the outfits I will use the same example. Orange, since I think Halloween, “what if I do a pumpkin mask or shirt?” And cyan I think it would be cold so a nice warm hoodie or sweater.