I'm making sourdough bread

I spent like 20 minutes fighting flour and water. So far I've done this for like 2 days and when i went to do the work for today I discovered that the yeast decided to be a jerk. It overflowed from the jar all over the top of my refrigerator and jar. So i spent like 5 minutes cleaning that up. The only reason why in putting up with this is because it's extra credit for my Biology class