To get past the clown, about halfway through your first day, a note will appear on your door. Read it and follow its instructions. The first time, you'll encounter a tall clown with a balloon. Take the balloon; nothing will happen. When you hear it again, follow it to the sad clown. Give him the balloon. Also, if you hear the Judge Judy sound effect, it means the red-eyed creature is gone, so it's safe to go out. -nattergerry
Thank you so much for all your feedback. And thanks to nattergerry for your help comment!