When I push to start button the car stutters before starting what's the problem?

You make have to get the throttle body cleaned. Is an easy process look up videos on YouTube I will also recommend using a fuel system cleaner from liqui moly and redline Both you can buy online and locally. You can have a shop who does free inspection look at the car and see what they say. Lastly get quotes and compare them to mobile mechanics networks like in this link https://bit.ly/3jPqGmH