Thank you for answers.
I feel like I've become better and more confident thanks to your course. And in addition I want to say thank you for your professional answers and your competence.
I got to this forum by accident and now I do not regret it a bit. Even if my knowledge of English is not perfect, I am gaining most understanding of poker exactly from your course, although I studied books in my native Russian.
Briefly, clearly, understandably, and also such great support from you and Katie!!!
Last question about preflop: If I got a pocket pair preflop, can I hide the strength of my hand so that my opponents think I have nothing and just call? Or is slow play a bad trick? Better raise 3bet+1 bet for each call on preflop for example with pair of Jacks?