my college proffesor taught me great techniques and tips for using a paintbrush and pencil. the best thing he taught me was to actually look at something, and figure out what colors are in it. for example-trees. every elementary student paints trees brown. tree’s arent brown though, they are all different shades of grey.
i suggest taking any item and seeing what colors are there. it makes even the most drab drive through a city, on my way home from work, enjoyable-to just notice the shadows of trees/buildings/people.
(eh i guess i shouldnt write so much when im tired. hope this makes some sense :)