Hello,

Yes you can pursue b.ed degree after passing BCA. But BCA ( bachelor of computer application) is totally different than b.ed. B.ed is mainly bachelor of education. If you want to join teaching profession then b.ed is good for you. But if you don't want to go teaching line then don't do it. You can do MBA, MCA for higher studies. You can do job. If you go b.ed then you are eligible for teaching profession.  And you can choose combination of subjects. It will be depends on institutions also. You can choose computer education, mathematics etc.

All the best.