What do I do now?

Kacen went to sleep with in ten minutes and without nursing. What do I do with myself now? This past year has been challenging, demanding, great! My youngest is making the transition from a baby and I'm not so sure! Free time, this just seems so weird. I feel like I should be doing something. Having a job, going to school, I have energy still, learning is good. Yes, I can do more here. Find more things to teach my children, pull out my sewing machine(Alona has a few dresses that need to be fixed). Scrap booking takes so long to pull out, but that would be fun. It is going to be hard to get into a different routine. He will not drink milk, he does drink water and juice occasionally. I know that he is getting plenty of liquids for how many times that he is wet. I just worry about him getting everything that he needs. Which is weird, this is my third baby, I know by now that they all turn out ok, but I still worry. The picture is of him enjoying playing in his yogurt. I am giving him chances to experiment with him feeding himself. I give him a spoon, but his hands do most of the work.
Kacen's festivities are planned and now to execute them. A potluck birthday party at my sisters house. I will make the cake Friday night and then just decorate it at her house. I am making the spaghetti sauce from scratch and have asked everyone else to bring something. And I will make the birthday cake and will need to get some ice cream, which I could try to make it grandma friendly (ok so more family members than that are diabetic!) and buy some sugar free ice cream. My sister is sweet letting me do it at her house, letting a good 20-40 family members come and hang out there, depending on who is able to come.