If you want to become a cohost, it's like any other business. Do your market research to identify hosts who are your target market and what you can offer that's different/better than your competitors @Anil581
Then develop a marketing plan and set up marketing channels to help you reach hosts you have identified as your target market.
It looks like you have joined this community in order to promote your cohosting business so may not be aware it's against the terms of this community to use it to promote commercial services such as cohosting.