assalam o alaikum

i m new here as recently i have thought of doing css.. before coming here i didn't know much about CSS so i hope i will get some help

what i wanna know is from where to start?
first i will have to submit some form now to assure my appearance in next exam or will they announce some date?
should i start the preparation from now and how much time will it take to?
will i have to take some classes or join some institute.. or the syllabus can be covered by own through books and internet?


thanks..