This is my first day using this, and I have already run into an issue. So I am on the Install Apps and Packages in Your Trailhead Playground Unit and I accidently installed the Dreamhous app package not in the playground. It will not let me uninstall. Secondly, I can not seem to find the Trailhead Playground at all. I have gone up and down this froum and have found no solution. It says that it should be at the bottom where the challenge is, and there is no option for it, Please help.