Welcome to SCS, Liz! If you are looking for challenges, you have come to the right place. SCS hosts at least one challenge every day and some days there are multiple challenges to choose from.
I am usually able to play along in two or three a week, and it is a fabulous way to "meet" people and form friendships here.
Just pick one and dive in! I look forward to seeing your work!
Here is a link to the challenges.