You’re probably not going to be able to "convince" them. You’re going to have to prove to them that it’s the right decision.
The first and easiest thing to do is prove you are responsible. Do your own laundry. Cook food. Clean the house. Do boring grown up things.
It’s going to be difficult if they are footing the entire bill, so the next thing you should do is apply for as many grants and scholarships as you can. Look first at the college you want to go to, and then look online. There are thousands online you can apply for by writing an essay or something simple like that.
After you’ve exhausted all the possibilities for outside funding, you should talk to your parents like a reasonable adult, and show them all the work you’ve done to get the scholarships and be responsible. Lead the conversation into the benefits of college in a larger city. There will be more internship prospects, more networking possibilities, and ultimately, more job opportunities.
If that doesn’t work, it’s not the end of the world. If you’re worried about transferring, meet with the adviser at the community college AND an adviser at the college you want to transfer to. Some community colleges have “Core Complete” programs that are guaranteed to transfer.