Twinkle Digital Marketing is a very wide topic and I can't cover it as an answer to question. Though Digital marketing starts with booking of your domain, designing your website , optimising it for search engine and then spreading it all across internet.
To spread across Internet you need good quality content which other would like to publish and link back. To answer your question in short you should try
- Search Engine Optimisation to start with & then
- Go for Social Media and start with 5 important channel such as Facebook, Twitter, Linkedin, YourTube & SlideShare
Please note I still have to understand in detail about products or services you are offering as sometime one need to change media based on if product is b2b or b2c.
Ideally as a owner of business you should learn basics of digital marketing details answer published here in series of article at http://www.kotak.co.in/reading-sequence.html