hi and welcome to both the site and the craft :-) where to start well, i belive in starting at the beggining, start with most people regard as the basics, meditation,vizualization,centering,grounding,shielding,circle casting etc etc. also try to read all that you can about the craft and ask questions, lots of them, its the only way to learn. go to faqs and look at newbie central too. Kusum, if i can be of any help then message me and i will glady do all that i can, although i am not a teacher. i wish you well, i would forget about casting spells for a while though its takes practice :-) learn the craft.
many blessings to you macus