30 is not too late to start but just be aware that it can take a long time to get that first real flying job. I started flight training at age 29 purely for a PPL. 18 months later I decided to quit my career and try aviation full time. It took a lot of time and heart ache and a number of years living on little or no income but eventually after about 7 years I got a break and was hired by a multi-national corporation as a co-pilot.
14 years later I am a captain flying Learjet 45 series and next month I am going to school on the Gulfstream G650. So it can be done but there are no guarantees and it may be a long road.
Good Luck.