Manipal University, Jaipur

I think, the main campus of Manipal is the best to pursue B.Tech than the Jaipur campus. Jaipur campus is still very new and the topmost companies still don't step forward for placements there. Placement and infrastructure wise Manipal campus is perfect.

Manipal University is a good option.

CSE at amity or any where is better course than anything else because of its big career opportunities

Its good but there are much more better options availaible than manipal jaipur.

Manipal University, Jaipur is relatively a new institution, but still it's doing really well as the placements were really remarkable this year. Manipal has got its brand name and value in the corporate sector, so in the coming year it's going to be in the top colleges of India. So, Manipal is a good option and you will have lots of opportunities over there, as it is a new institute.
I hope that I have answered your question.

Yes, it is good.