Networthify is a fun tool to calculate time to FI, but it's not helpful at all for calculating your current situation. You need to already know income, expenses, savings rate, etc. to use it effectively.
or is there something better I should use?
Yes, probably, but you still need to answer this:
clarify what exactly you want to track and why
You seem to be a little overwhelmed with what you need to do, and thus not sure of where to start. Correct me if I'm wrong.
So I'd suggest you start simple: Start to track all of your spending. Track all of your income.
Just get a monthly number for how much you spent in a month (categories will be good if you're trying to reduce spending, otherwise they're mostly irrelevant, and a single number is fine) and how much you made.
Get those numbers for several months in a row (do you have data going back at least a few months, if not a year or two?), and we can go from there.