Good news: I gathered the bankroll that I set to the absolute minimum to play 5/T - it means if good luck comes my way I may be able to forget 2/4 and introduce myself to the 5/T players in the very close future.
Bad news: With the volume I played in the last 1.5 months I can't comfortably move up any limits. I played a session today (first in 4 days), and felt I didn't even know the rules of the game. I was rusty and had to play ~100 hands to get back to the grinding mode. That's awfully frightening for me, I have to play more in the future, and not just more, but frequent too. After the fucking exams and end-of-the-semester shit go down I'll focus on this aspect of my game. I have to, sadly.