How can i promote my business ?

I think you first need to decide if you can actually work worldwide. That is huge, that is unlike anything else you have ever done with your business. A little tip from a fellow small business owner, prove your concept in your local area first and then move internationally. Moving international can be the quick end to a short term business

1. choose the top keyword of your services as your domain name

2. do proper SEO for your website and also digital marketing

3. to promote your business, make use of all the social media websites and google ads to get more revenue

A good logo, a great domain name with a very catchy website and social media and google ads will help your business. You can read more in this article

https://www.designagency.gr/how-to-achieve-a-succe...

Get a sign and hold it and dance in the media of a large boulevard.

Yess you can promote your business for FREE

There is a Instagram page that allows you to promote your products and services for FREE

Plz read this article : https://bit.ly/31ptYne

The process is called 'Advertising and Marketing'.

There is a TV show called 'Mad Men' watch that entire series... and then come back and ask a valid question.

try zoneclassifieds.com they offer 10$ bonus 

ask someone to help you do that

So, what kind of business is it?