Hey there

Both fields are great and you can choose anyone according to your interest. I have given below the details of both fields for better understanding:

Cardiologist:

• The average salary you can earn is 2 lakh per annum which can increase upto 16 lakh per annum.
• The main work of cardiologist is to cure patients with disease of heart.

Software Engineer

• Cognizant, Wipro, Infosys, Tata consultancy Services recruit software engineers at great scale.
• The maximum salary software engineer can earn his 18 lakh per annum.
• Software engineers are recruited in information technology companies which work on ongoing designs

For more about Software Engineering:

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.careers360.com/careers/software-engineer&ved=2ahUKEwiWvKX_uKP0AhUojdgFHVJ3AjoQFnoECAgQAQ&usg=AOvVaw1OkZzBk0MnwkPYZNeB5FX2