So my tips are if you start a new game.
1 don't buy expensive equipment buy what you need and don't waste the money.
Build production buildings in fs25 u have a few cheap options to start ur production.
Sell products and crops at the highest possible price. So if its not at the highest price just store the crop/products
Do contracts its a fun way to learn the game more and u also earn some money from it.
Use fertilizer on your crops it is not cheap to fertilizer your crops but it will help you earn more because if u fertilizer the crop it will give u a bigger yield.
Greenhouses are a good option to make a bit of money since they only require water and time.
Place passive money objects like windmills/solar panels. They coat a lot but they will give u money overtime and eventually they will pay themselves back.
Just have fun.