AlexB ref the Project Accelerator, it's a decent starter if for nothing else than generating ideas for what else you might want to build out around P4W.
It's a managed solution so making changes is done via a solution layer on top, that took me half a day to get my head around but is simple enough for basic things like changing Project Types or moving surplus fields off the forms.
The snag with P4W isn't the Accelerator itself but that many of the features only work if it is deployed in the default environment.
The attraction of a project management tool built around the Power Platform is the opportunity for extending it. In order to do that, one should deploy to a named environment. That's Microsoft's recommendation. By doing so you lose most of the best new features like templates, integrated chat and so on and on.
That contradiction is very frustrating to me. So it's not the Accelerator I find disappointing, it's the loss of features.