Animation

No, you no need to have a good drawing. You just have to have focus and you will learn everything in your college. Is it necessary to disassemble a car then only you can pursue automobile engineering?

Just go to the respective website and apply for the college.

For certificate courses, there isn't any entrance exam.
It is only for UG or PG courses, entrance is must for admission.

Hi Kabir,
Graphic designers and animators both work in a creative field that involves developing designs primarily using a computer. While graphic designers create designs used in advertising for clients, animators create designs and animations that are used to entertain audiences. Both are equally good fields and well paid. Think about both and see one excites you most - go for it. Keep one thing in mind - Graphic designing has more scope and areas of work (media / advertisement / fashion / architecture / interiors / Textiles / even management, etc.). Whereas animation is restricted to media / Cinema / advertisement, etc.

The classes are usually conducted in the morning only.

You do not have to do it separately. You can do this course - Bachelor of Web Design: Degree Overview;
Bachelor of Web Design degree programs teach students how to structure websites, design web pages and produce multimedia projects. Students are trained in a broad array of software tools, protocols, and more.