Always Start Slow: Keep a slow relaxed paced in the initial typing time.
Accuracy > Speed: Initially give more attention to accuracy and later to speed. First develop accuracy, then develop speed. Or you can say once you develop accuracy, developing speed later becomes easy.
Disable Backspace: If possible practice typing after disabling backspace. This improves typing accuracy.
Practice in noise: Play abhas saini typing sound video to get right idea of exam.
Practice Previous year content from unicorn type: Previous year typing content is very useful to ace in the real exam. Unicorn type has previous year ssc content. So you can practice from there