Dream to be a pilot

I am Mohd. Kaif. I am 20 y.o. from Dehradun. I am writing because I want your advice. I went to a local school. It was not very good, But I still passed 10th board. Then I wanted to study science but my school was only till class 10th, One other school which was not expensive was closeby. But they did not offer science also (low marks). My brother was in my class. He was happy with Commerce but not me. So I joined NIOS open school. However class 11 was very tough. I was advised to revise 6-8th from Khan Academy. Then also 8-10th. Both maths and physics as I dream to be a pilot. I have attached my progress in KhanAcademy. But NCERT is giving me a challenge.How can I improve? Should I continue this dream?