I have been inclined to pursue this, but I won't probably get a role in a company if I don't have enough experience with DS, and to get experience I need to be

I have been inclined to pursue this, but I won't probably get a role in a company if I don't have enough experience with DS, and to get experience I need to be good at it, it's a classic chicken & egg situation. What open source projects do you suggest to get started with?