Hello. I'm Nick, I will have a family vacation this September. I chose Yosemite location and I don't know where I should go first, you can go and introduce me. This is a family trip, we go on our own without a tour. Thank you.
It sounds like one of the first stops you should make would be the Visitor Center closest to where you are staying. There are a lot of things to see and do, and the park has plenty of information about all of them.