Am I shaving too often?

So I'm sixteen now and I've been shaving my face once every 2 weeks - 4 weeks. Just around the period where my facial hair begins to become noticeable and I look scruffy. My parents tell me I'm too young to shave and that I should trim but does trimming really make a difference in hair thickness? I prefer to have a clean looking face and all the stubble makes me look kinda scruffy so should I stop shaving or change how often I do it? Thanks.