Spring!!!

So it is officially spring time, and I love it! Even though I live in Cali and it has been warm for awhile, I love the idea of spring. Spring is a time for new beginnings. Everything is blooming or getting ready to bloom and the bugs are all crazy doing the flower dance.
We have a lemon tree in our front yard and it just started blooming. The smell is amazing! I have tried to spend more time outside with the sun. I think it makes me feel better.
I also am trying to plant flowers. I have never had a garden before so I dont really know what I am doing. I have some seeds that someone gave me, but I think I might be too late and there are all listed as full sun flowers. My yard only has partial sun. If anyone is a gardener and would like to give me some help, I would sure appreciate it! I have a window box on our porch that is in a pretty shady area (it was put there by someone before us) It needs flowers so I am trying to decide what to put there and whether it should be seeds or just go get the one from Lowes that are already blooming.
Maybe I should go outside and sit on my porch until I get some inspiration!