Hi, It is very easy. To create a LinkedIn group from my company page just follow these steps:
First, navigate to your Groups homepage. Next, click Create group on the upper right corner of the page.
Then, follow the instructions for each field in the Create group pop-up window. Finally, click the Edit icon above Group name to upload a group logo.
You can also learn a lot from the following article:
7 Advantages Of Using LinkedIn For Workers & Businessmen