I want to start own poker room in the internet. Where should I start from? What is the best software to choose? Can you advise any affiliate programms?

You should start of thinking over the whole business concept. This is a tricky and risky business and you should see that you have a lot of competitors. Very strong competitors. You shouls pay a lot for promotion and marketing koz this will attract new players and bring you more money. Also note in some countries gambling for money is forbidden. Yes and software should be stable and certified. If you have a good budget you may use microgaming software. They are leaders of the industry. I also like Enterra Poker software. The price is moderate and the quality is good. Besides they say you can customize the software. I advice you to have a look at Poker listings for more software with reviews.