Try this first
Weigh the coffee and water you use, then keep that ratio consistent for one brew.
Why this can help
A repeatable starting point lets you decide whether to use more coffee or adjust the grind.
What to try next
Taste first. If the cup is watery, try a little more coffee; if it is also sour, try a finer grind.
Related skills: Brew and coffee fundamentals. Explore the Home Barista Roadmap for more context.
Every coffee and setup behaves a little differently. Make one change, taste, and keep the result that works for you.