Looking to try solo rpgs, Would this book be a good start or are there better ways?

So im in a almost weekly dnd 5e group but i feel like i need something more to do in my personal time. Im considering trying solo but im used to being in a group and not by myself, and i feel like i cant get creative enough to play solo.

I recently found a book (as seen in image above) and im not sure if i should try it or if there are better solutions?

What would you advise?