Dear Nishu,
If you wish to become trainer and if you have stage fear then the first thing that you need to do is to take training on Presentation Skills. Once you master presentation skills half of the battle is over.
Nevertheless, employee training is far more than mere giving presentations. You need to be subject matter expert, understand your client's requirement, you need to develop ability to transfer the knowledge to your participants, help your participants in the preparation of the Learning Implementation Plan (LIP) and above all should be clear as to how your training will benefit your organisation or client. The benefits should be measurable and tangible and there should not be vagueness of any kind.
The first step to become trainer is to know how other trainers conduct their training programmes. Have you done that? If yes, how many training programmes did you attend and what were your observations?
Thanks,
Dinesh Divekar