Trying to Bulk. Please help me gain weight. Asking for tips.

Guys I am 173 cm and 56kg and have been trying to gain weight but I was barely able to gain 1 kg in one month. I don't know what to do I have been eating over 2500 kcl everyday and even doing home workout for your everyday. Recently i bought nakpro mr fit mass gainer but it doesn't show much effect.

Recently i was able to make my 6packs abs visible due to low body fat.

Pease help me and tell what i should do.

I really want to gain weight and reach 65kg.