Never played poker so it's quite complicated for me.
That's why I want a tutorial with some Info how to play poker.
Also can I play poker for trial without using any funds ?
Try to find some online tutorials. I could be wrong but as far as I know Betcoin.ag does not offer free games and Poker lessons. Practice for free later try Betcoin.ag Tourneys and use your tickets. Thank you.
Yes, online tutorials can be helpful for anything, but sometimes, we need to go through the motions of actual application with small amounts of value in order to really cause our techniques to sink in and to really learn from our techniques.  
Personally, I think that we have to weigh strategies that could work for us by employing very small amounts in the beginning until we get the hang of it - like for example the minimum amount that is acceptable.  
I employed a similar strategy in trading BTC - and I would frequently get criticized for spending a lot of time on trading very small amounts (close to the minimum) and not making any money.. which was true, but as I got better and better and reviewed my results and continued to tweak my strategies, little by little I increased my amounts.. and continue to learn, too.