This game is promising, but so confusing... I'm feeling helpless like... I know what to do, but I dunno how should I. How should I find heroes? How should I get more servants? How? This game is really lack of guidance Imo
The wiki has lots of information but if you don't want spoilers:
General Principle: Explore, Explore, Explore.
You start with three main spots to explore: The ruins, town (technically there is also an option to work as well), and the woods. The Woods is a good place to gain servants, The Town is a good way to get money, and The Ruins are a good place for more specific material and money.
You will find the heroes in these areas but they take time to be available, so you need to constantly go to them. It can admittedly start slow. Don't worry if you feel lost or confused, the game doesn't give too many hints on how to approach it (well, maybe besides Felicity).