‘We’ in the sense of separate individualities can never become fully like Shri Krishna, who is infinitely beyond us. But we can become more and more like Shri Krishna by attuning our consciousness to Him. This will cause us to naturally imbibe some of His qualities.
First, do your Dharma, and avoid Adharma to the best of your abilities. Don’t cause suffering; don’t promote ignorance. Follow what you feel in the depths of your heart to be right, and always try to treat all beings with respect and kindness.
On top of that, fill your awareness with Krishna as much as you can, in the ways that feel right to you. Repeat His name(s) in your mind, sometimes also out loud. Worship Him with real devotion, however that devotion can best express itself. Surrender to His feet and cling to them as your anchor. The more that Shri Krishna is lively and joyful in your consciousness, the more like Him you will become.
I would strongly recommend seeking out a God-realized Guru to help you with this.