Welcome to to forum!!!
You have already been given some good advice by some of our seasoned members.
Great that your parents are on board with you getting a bike. Respect that and take it slow. You do not want to make this the first and last bike you buy for obvious reasons. Unless you really end up not liking the sport or the motorcycle community. You will quickly learn that we are a great bunch of guys and girls on here and when out riding.
Show respect to others when on rides and on this forum. If you start being cocky and showing off (once you are comfortable to to join group rides) you will most likely be asked to leave or not be invited to other rides.
Just like on this forum, treat other members with respect and appreciate and take in the advice you are given. Many of our members have been riding and working on bikes for longer than you have been on this earth.
Show a nasty know-it-all attitude (if and when asking for advise) and you will quickly learn that the answers given will be much different, if given at all.
There are many thread examples where new members came on here and conducted themselves respectfully, asked for help and were given good advice. Some guys even offered to help wrench on their bike, help with delivering bike from sellers or lending tools out etc.
As for your bike.
This time you can tell your parents that they are wrong. Your first bike does not need to be a new bike. There is nothing wrong with a used bike.
Chances are you can buy a used bike an still sell it in 1-2 year for the same or very similar price. Not loosing much $$$ on it while gaining lots valuable experience.
As a new rider, your insurance will be expensive. Pick a few bikes as possibilities and call around for different quotes. You may realize that the bike you want has a really high insurance premium. You may be forced to go with your 2nd choice. (unless $ in not an issue)
Don't forget to set aside some $$$ for good gear. Yes, even used gear can be good gear. You do not need to be a model for any 1 specific brand. Better being protected then looking good.