New Pro User, Trying to modify 5th Edition OGL by Roll20

Howdy, as the title says, I just got into sheet editing due to players in my campaign having trouble following the math I'm putting into it. I am... very uncertain on how to do this... I'm mainly trying to add in a new page, that can do math for my players, and what penalties they have for being in that situation.

That might be much better handled with Character Abilities (macros tied to a sheet). If you are uncertain of what you are doing, the OGL sheet is probably not one to experiment on, being fairly complex. What specifically are you trying to do?

I'm trying to add in a 4th page, with unique values that are unrelated to stats for a good part... In my game so far we've just been doing the math by rolling. It would be something like [Magic Capacity - 0/20]. The armor part could absorb energy, but once it hit the limit, it would make a Combustion check of Dc 10 + Every 10% above the limit it was, and the player would make a Con save.

It does sound like you will have enough house rules to require some kind of record keeping. Unless you are very comfortable with html-css-javascript, though, I'd suggest examining ways to add attributes and deal with them using macros. However, if you are bound and determined, good luck to you! You've exceeded my ability to give any guidance. :) Hopefully one of the many sheet writers can give you some pointers.

Well, thank you very much for trying! And no, I have no experience with html-css-Java at all, which is why I was popping in here for help