A non-weighted GPA doesn’t exclude weighted classes. So nothing can ‘balance out’. Weighting should be purely additive.
Yes, OP, finding and understanding your school’s grading and weighting scheme should be step 1. That fact that you are mixing 4.0 and 100 point scales says it’s a somewhat non-standard system. Investing time to figure it out and calculate the numbers yourself will be a better investment than asking others.