what ac missed is that the 2nd number on the sidewall is the sidewall height, indicated as a percentage of the width of the tread. very confusing.
i suggest playing with this to see roughly how anything else will fit.
https://www.ft86motorsports.com/wheelitfit/
you want to avoid running a larger overall tire, as it will alter the indicated road speed, as well as affect final gearing negatively. the car will act slower.