Hare Krishna, swami maharaj. I am doing Sadhana but I can't absorb my mind because of engaging in many activities and hanging out with many non-devotees friend.. How should I manage this?

HpS - AGTSP! Basically just use whatever tricks you know to keep your mind focused on your chanting of Japa, and even though these maybe mechanical tricks they will stimulate deeper connection with Krsna.

Also, because you are trying, using your intelligence, to become more deeply involved, Krsna will probably be making arrangements to help you. So, look for them and then fight to accept them.