should I go to uni

Hi all, not sure if this is the right thread to post in but seeking advice. After 10 years in the same industry I've decided to have a change. I've been really interested in finance/accounting/HR roles so I decided to go back to uni and am enrolled in a commerce degree. Unexpected I've landed an admin role in a construction company and I'm really enjoying it, it's quite a niche department I'm in but there's the chance to work my way into different areas. Am I better to work my way up in this industry or stick to my original plan and go to uni? My biggest concern is the hecs debt (I already owe money from a previous degree I didn't finish). With a degree I'd be able to pivot into a lot of different industries but I'm worried a job isn't guaranteed and if I end up staying where I am it will have been a waste. I'm planning to do it online so I'll be working in this role regardless, initially I had just planned to get a basic casual job and complete my studies...any advice is appreciated