The most practical RPG character sheet isn't a static form, it's a living calculator that adapts as your character climbs through twenty levels. The user who posted this question is already thinking in the right direction, even if they're not yet sure how to wire it all together. That's exactly where a spreadsheet shines, and where most players get stuck: they treat the sheet like a printed page instead of a system that can do the math for them.
Let's look at what they've already figured out. Levels as columns, skills as rows, that's a clean, logical grid. The real challenge is the "non-level bonuses," those situational modifiers that come from equipment, feats, or temporary effects. The solution is simpler than it seems. Create a dedicated row or column for each bonus type, then let your main skill total be a sum that pulls from multiple sources. For example, your Acrobatics cell becomes `=BaseSkill + LevelBonus + FeatBonus + EquipmentBonus`. Each bonus column stays separate so you can toggle or update it without rewriting everything. The user only wants basic addition, and that's all they need.
What this means in practice is freedom. Instead of erasing and recalculating every time you gain a level or find a magic item, you update one number and the sheet recalculates everything instantly. That's the core promise of an AI-native approach to spreadsheets: not more complexity, but less friction. The user asked for starting tips, and the best tip is to think in terms of building blocks. Start with your eight skills and your twenty levels. Add one bonus column. Test it. Add another. The sheet grows as your character does, not the other way around.
We encourage you to experiment with one skill first. Map out level 1 through 20 in a single row, enter your base skill points, then add one bonus column for a common modifier like a class feature. See how the totals change as you drag the formula across. That small proof of concept will teach you more than any template. When you're ready, you can duplicate that pattern for all eight skills. The goal isn't a perfect sheet on the first try, it's a sheet that becomes smarter the more you use it. Start small, let the logic compound, and your character sheet will never need a manual recalculation again.