Well you can do many things after your BCA.

• You can go for higher studies like MCA , MBA.
• If you are interested in a job you can proceed further, prepare yourself with some coding skills and can apply in the bunch of IT companies. But remember one thing salary will be a constraint for you ,if you have only done BCA and if you are a fresher ,because there is a huge difference in the pay scale for a B.tech and BCA graduates. But if you want to learn the technical stuff and want to make your career in IT then go for it , work hard and once you will get experienced , you will automatically start getting high package.
• And apart from all this stuff if you want to make your career in Government sector you can prepare yourself for that which includes SSC, Banking, UPSC etc.

Good luck!!