I'd wager you are unlikely to find anyone to commission the sheet for you at a price you'd expect. Here is a thread on the topic that might give you some context. Regardless if you end up trying to make it yourself or have someone do it for you, it would be a smart thing to formulate a few things about the sheet/system you're requesting. What system is it similar to? What's the core rules(dice-rolling mechanics and stats calculation)? Is there already exist a character sheet that is similar to this sheet/system? It's quite likely there is an existing that could serve as a base for making your sheet, and there are tons of documentation that can help you get started you you brave to try it out yourself. I can tell you that I myself started with close to zero knowledge on HTML/CSS almost two years ago, and picked up the basic and later learned quite a bit, expanding the character sheet creation documentation with pointers that I knew was good to know when trying to make sense of things. Building Character Sheets is the article to get started with after taking a few minutes to get familiar with the absolute basics of how HTML works. Roll20 char sheets have a few modifications to how html is written, but they are all mentioned in the linked wiki article. It also links to several if not most of the useful an relevant other articles on the wiki or general html/css learning sources. The Character Sheet Repository is where you find all current sheets that can be selected in the dropdown, you'll likely find it informative to look at the code of a sheet you're familiar with after you learned some basics. Good Luck! Edit: If you try it out a bit and see how far you get but yourself and then return with questions on character sheet creation, the people here are more than willing to help you out. It's just generally harder to answer a very broad question like this, but I assume you were looking for learning resources anyway and not just a direct mentor.
