rate

how do you get ratings for your company 

Check the wiki :) I'll quote the relevant part here:

"The Company Ranking is a 10 star ranking system based on how well your company has been doing quantified by gross profits. In order to improve a company, you should strive for the best profits because profits only come by running a company efficiently. The company can only rank up to a certain cap - widely believed to be based on gross revenue: if the company has generated more revenue over the course of its lifetime, it has the ability to gain a higher rank.

Company Ranking can effect how many job points are granted (1 job point per 1 star), and how many stats a company director gains. Company directors gain working stats based on how high the company has ranked:

• 1 star - 5 units of every working stat daily
• 2 stars - 10 units
• 3 stars - 20 units
• 4 stars - 35 units
• 5+ stars - 50 units

Your employee pay does NOT affect your company's ability to star up (a common misconception).

Companies have the ability to rank up or down automatically every Sunday."

Chuck Norris' Guide to Directoring

why would you own a company when your nw is only 5m? Your restaurant wont get you any profit and you will later on sell it for a low price. You should try joining a company and get trains, use perks, etc. Also you should work on earning money. One day of travelling can double your current nw.

It was a bad idea for you to start a company while you are only at level 12. I assume you have not completed the required education nor have the required stock benefit blocks. Also I suspect you have the networth to manage the company until it breaks even. You can sell the company to the system. Start following advice from Baldr's basic advice. This is a long term game. When you have advanced through stats and networth, you can then start and run company efficiently. All you need now is patience and curiosity to read as many guides as possible.