Do you have any advice for a student who wants to be a novelist?
Be prepared to have a day job that will support you as you work at your craft as a novelist.
Find a day job where writing is a key component. As others have said, you may need to support yourself as you work on your novels. But while doing that, it would be ideal to still be honing your craft. There are freelance opportunities, or writing content for marketing at a large company.
Conversely, you can find a job that pays the bills but is not a mental distraction if you want to make novel writing your main focus. But be prepared to be a "starving artist" if you aren't looking to get promotions and more responsibility that would distract you from your writing.
Either way, dedicate yourself to finding the time to keep at it.
In short, be realistic about life as a novelist, but don't lose heart.
Read Steven King’s ‘On Writing ‘ and then ‘Nobody Wants To Read Your S**t’ by Steven Pressfield. Both brilliant. Work everyday at it. Don’t give up. LEARN THE CRAFT. These books will help you to do so. Harness the desire while you’re young, it doesn’t necessarily get easier as you get older. Huge amounts of successful artists got rejected many times - they persevered. Persevere.