What can I try implementing after reading the Part 1 of Sutton and Barto Reinforcement Learning book

Hi

I am just getting started with RL and on the last chapter of part 1 of Sutton and Barto RL book. I have already implemented all the programming exercises in the chapters, did some of the derivations from the book myself and implemented the algorithms introduced till now.

Before moving to Part 2 of the book, I wanted to work on more problems, which might be slightly larger in scope than the toy exercise problems in the book. The constraint is obviously that they should still be solvable using the tabular methods I have learnt about till now.

Could someone please suggest what more can I do to be a bit more hands on while learning the theory.