I began sim racing before I learnt to drive and I think that it did help, but anything learnt should be taken with a grain of salt.
Firstly, sim racing won't teach you anything useful about driving on the road, with other cars. I don't know which country you live in and what the rules for new drivers are there, but this can only be learnt in the real world, with either parents or instructors.
What sim-racing can be useful for is learning some basic driving skills, particularly with driving a manual. Anyone can drive an automatic car (I've driven go karts since a very young age, just casually, with no teaching whatsoever, and they essentially function like automatics - 2 pedals, no driver-controlled gear box/clutch - if a kid can do it, anyone can), but I think I learnt to drive a real manual smoothly much more quickly than I otherwise would've without sim-racing experience. Simple things like being able to easily find the right gear-gate without looking, and being able to rev-match. I even taught myself to Heel-and-Toe in sims. However, even learning this sort of thing should be taken with a grain of salt, as most sims don't simulate the use of the clutch very well, and most pedals don't simulate the feel of a clutch well either. This was something I also had to learn in a real car.
There are other possible benefits that I have mixed feelings about. There is a possibility that in an emergency situation, you may maintain better control of the car due to understanding oversteer/understeer/car balance etc. However, the feeling in a sim is very different to the real world, as FFB in a sim is completely different to steering wheel feeling and the feeling 'in your bum' that you get in a real car. So if you have access to some club motorsport, or even casual go karting, that would be better for that sort of thing.
In case of TL;DR: Sim-racing won't hurt, but it's benefits are very small. It would be silly to learn to drive in a sim, and then expect to get into a real car and be able to drive well instantly.
