Early on there are a few viable ways to make money. While basically anything can work, you usually want to prioritize doing things that make money and set you up for later on in the game (through making you work on infrastructure, clearing the farm, levelling up skills, etc.).
The best way early on for a new player is fishing. It may take a little while to get used to but scales pretty well as you progress through it as a skill and unlock new tiers of associated gear.
The only other really viable money making strategy that doesn't start to delve into more complex strategies is killing monsters and harvesting gems in the deeper levels of the mines. Done well this can easily rival and outpace equivalent fishing (before you get more fishing infrastructure up), and is especially useful in getting mining/combat leveling up, getting materials/tool upgrades, etc. vs fishing which gets money and fishing levels but not a lot else on it's own.
If it's your first time playing I would recommend dabbling in everything but fishing is your best choice for money making early on, you can supplement with crops here and there (especially if your mining on the side is netting a few sprinklers) but the return on it is usually not worth the investment early on due to the comparatively long time for crops to pay themselves back in the first few weeks/month.
to get the Tea Sapling Recipe from her. They sell for 250g each and the ingredients to make them aren't hard to come by. Many people recommend Fishing and yet others prefer growing high g Crops like Cauliflower and Melons. Those pay off pretty well for a minimum of watering per g spent on seeds. I do all of these though perhaps less on the Fishing side.
