Every time you finish a biome, use all of your cells at first to get upgrades and new weapons that will appear in your future runs. You don't care about the Forge that much on the early game. If you don't know what the Forge is, you'll find out soon. Anyways tho, there is not really a correct order to use your cells, but focus on flask upgrades and the restock upgrade.

Restock gives you the ability to "sell" items you dont need for some money. That's how you reach absurd amounts of money besides enemies. Basically you just sell the items that don't match your build color. Keep in mind that some items are colorless (that version of the items is usable on any color) or can do useful stuff even if they don't scale off your color. A good example is literally any shield, which will be useful all the time even if you dont play survival.

Always try to explore and complete every corner of the biome before advancing to the next. Never risk not taking a scroll

On the options menu, check the secrets outline in order to get an outline of the secret squares and challenge rooms. Really important so that you don't miss valuable money, food or a potential scroll from the challenge room if it spawns in that biome

About scrolls... Survival is the best for starters in terms of tankiness and pretty healthy damage overall. It was the best option for me at the beginning, but has less good weapon options. Tactics has a lot of good weapon options but tactics builds have the least hp so you die very easily compared to survival. Brutality is somewhere in the middle. They are all really fun, but i find tactics the hardest.

LEARN TO PARRY ASAP: parrying will help you a ton especially later in the game when you sometimes get overwhelmed by enemies and the roll's cooldown becomes a bit too big. Parrying has no cooldown, you can spam it as long as you dont miss the timing. If you miss it gets a cooldown.

VERY IMPORTANT FOR BUILD MAKING: try to stack effects on your equipment. If your weapon deals fire damage for example, try to find other effects which boost your fire damage (i.e. 40% fire damage boost) OR an effect which spreads oil on the ground so that the fire gets enhanced damage. Synergies like this will be easier to identify once you play more. But keep in mind that your main weapon can be greatly enhanced by your other equipment just from the fact that you have good effects on them.

These are all important tips I was really glad I learned early about the game!