many schools do offer spoken english classes for classes above 6 and it is really helpful u have to right many conversations in english hear conversations, learn to give directions etc......really good

 good suggestions

along with speaking, you need to keep writing too. writing will strengthen your familirarty with words and their usage while speaking.

I'd suggest not to go to just any Institute. You can go to British Council and enquire if they are offering any such course - if they have a branch at your place. Or, better start with some good books on spoken english. Actually, aou'll have to work in a group to make it more effective.

 slogans on no firecrackers on diwali.

This Diwali  "CRACK JOKES NOT CRACKERS"

First of all you do not need to scare of english language if you are doing mistake in spoken english also just speak let other correct your english this way you can improve a lot...

1. You have to try talk in english.
2. You should not feel narvous or feel shy while talking to any one.
3. You have to start reading newspaper.
4. You neet to start watching english movies and do try to learn how to speak proper words and sentence.
5. You have to give your 100% efforts and do try to be a good speaker in public and with more confidence and good communication skill.

So all of these things will definatly work for you :)