How to capture birds in air

I learned wildlife photography by myself, When I was in 1st year of collage I captured photos of ducks, pigeon and crows using my realme 2 pro phone, after some days I purchased mobile lens to capture birds and after some months (1 Year) [ Why 1 Year well I belong to middle class family, and I'm not earning money So I have only 1 option (at that time) ask from my parents for camera, and yeah ! they said NO, NAHI, ILLE ! actually now I know why they are saying no always, At that time my age is 15 and Im not matured yet to carry, use and handle 60,000 Rs Dslr. So I'm

My first proper capture photo of bird was a flying spot billed duck over water in Maharashtra, Solapur.