This is what most people overlook. They spend so much time trying to find hacks and magic pills which will make everything easier for them that they completely forget that in order to get good at something, you have to do exactly that.
If you want to become a good cook, you will have to do a lot of cooking.
If you want to become a good painter, you will have to do a lot of painting.
If you want to become a good teacher, you will have to do a lot of teaching.
Why should writing be any different?
Yes, there is some accessory work you can do — look up recipes, take a walk and get inspiration for your paintings or read articles on learning psychology.
But these are just that — accessory work. The real deal is within doing what you want to become good at, because that is where you get the most learning from.