My drawing is very weak. Can I do Diploma in civil engineering?

Don't bother about it. Even I don't have good drawing skills. Just join civil engineering, you would really going to enjoy. So many opportunities and lots of joy. You will gain practical knowledge. Finally, coming to drawing, drawing instruments are there like drafting scales, etc.

No dear, drawing is the back bone of civil engineering. But, if you work hard and focus on your goal. You can do everything. So, Never give up.