“Don’t reinvent the wheel” is very good advice. You have already done most of the things you’ll ever want to do, just in a different combination.
Everything you do is a specific ordering of certain core components: the things you write, the way you interact with people, the sweat of your brow and the chime of your heart. You may only have thirty or forty “core components” like this – but that comes together into tens of thousands of different recipes you can make.
The upshot of this is: you don’t have to figure out how to do anything. You just have to figure out how you did it. Because you already have. Don’t reinvent the wheel – just scrap the last car you built and put the parts together different ways.