OK, I've been studying today and my Poker Road is becoming more clear.
Starting from today, I'll keep these things in my mind addition to the rules in my first post:
1. Play TAG until you reach NL50 meaning that at least 2000$ bankroll.
When I have +3600$, start the TAG -> LAG transition process while you're still playing NL50.
2. Don't be scared of TAG players as there are bunch of bad ones. A TAG player is more readable than a LAG player so no need to be scared of him. Play more LAGgish against them until they start firing back LAGgish.
(here I'd like to thank to HasenBraten and TribunCaesar as they are the guys who made me understand this in their videos. They always repeat this very important thing. You rock guys :)).

