Hi,
You can clear CAED in first attempt itself. However I suggest you to keep your CIE marks of 40 or more out of 50 so that you have extra marks for makeup exam. In case if you couldnt clear in first attempt then makeup will help. CAED is not that tough though.
And coming to internships, you need not worry in first year itself. You can start for it from 2nd year(4th sem) onwards.
All the best.