The first step will be the independence from Burgundy. Therefore it is vital to get France to support your independence. It is best to declare war before the Maine event. You should be able to take at least one province from Holland an release Flanders from the Personal Union with Burgundy. Aggressive Expansion and unlawful territory will be a massive problem in the beginning. The latter can be solved by allying the Emperor, likely Austria. Conquering the burgundian provinces with Wallonian culture before the burgundian inheritance will prevent future wars with France.
In order to form the Netherlands you need a core in the provinces of Friesland, Gelre, Holland, Utrecht and Zeeland. When forming the Netherlands you have to decide, whether to keep the old Traditions and Ideas or get the new Dutch ones. The old ones are useful when planning to specialize on ground warfare, while the new ones are more trade and ship orientated (e.g. Inflation Reduction). Also note, that the Netherlands will automatically leave the Holy Roman Empire.
Depending on how you decided, you can now either start colonizing and fighting Great Britain or go east into HRE territory.