Personally, I take solace in numbers! A nice warm up exercise is 100 PDL exercises, which are still looking for 20 solutions, if you fancy the challenge. Or branch out to other scientific projects.

Interested in Data Science? There are a lot of perl modules out there that will let you build plenty of data science tools, but not a lot of instruction in how to go about doing that or what you might want to do. It's a big enough workspace that there will be something in there at your skill level and there is great value in telling people how to use the existing code.