Dear leaner,

However it's maths definitely will be high paying as maths is a challenging subject for many of us, glad you are interested ,

They are many courses after 12th regarding maths as a domain like btech,bsc maths ,nda, aviation,bcom computers ,ITI, architecture.

One with maths subject as expert can deal even in real life .they are many jobs like economist.astronomers,maths scientist, mainly data scientist earns 3,64,000-27,20,000 per year , so much money on shoulders.

All the best.