Please help me out with this query

Can anyone help out why did you choose data science as a masters course? 

I am working as a softeware test engineering

I thought of saying this to interviewer:

I started my career as Software tester but I haven't seen much growth in this field. Then I'v explored about data science which perfectly aligns with my career goals. I have gained some knowledge by doing online courses and virtual internships.  So this masters degree will help me to dive deep into the field of data science and after competition of masters I can work as a data scientists in top companie. After few years of work experience I had a plan to run a startup in the field of agriculture using data science techniques. 

Can anyone please help me how can i convince the interviewer?