A Place for Practice/Challenges?

Hi folks, I hope this isn’t outside of the scope or against the rules, but I"m trying to still wrap my head around getting more proficient in wielding Robot Framework for my job and leisure. For programming practice like C, python, Javascript etc, there’s plenty of sites that have challenges or program idea’s that you can do to build up being more proficient in the language. Does any such thing exist for Robot? I’d love for a bunch of increasingly more challenging tests that serve as practice… Does anyone know of anything like this? I’ve seen plenty of tutorials…which are fine,but nothing hands on that sort of gives you a task to try to complete…
Thanks!