Wow what a lot of beautiful pictures. Nice. Envirogirl remember what photography is Photo (light) Graphy (writing)
So look for the light, highlights, low lights, softlights, bounced light,
take a picture of a black teddy bear outside at different hours during the day and save these and write down the time of day and season and what the sun was doing. For the first set you could do all sunny day pics and the second set cloudy day pics, mildly cloudy day pics)
do the same with a white teddy bear. (preferably same day)
And the same with a green object.
Save all these and you will have a good base of knowledge right there. Oh yeah and dont forget to write down the settings on your camera too. for each of the pictures. So you will have a scrapbook of pics of a white Teddy bear, black Teddy Bear, and green object at say 6 am Sept 3 settings on camera are.....speed, what mm your at, etc (you fill in the blank). Then at 7am same thing. and so on....all day long.
Another thing you could try is taking pics facing east west north and south from same place in the yard. And save and study.