Focus on farming and ganking lanes that will allow you to get blue Kayn with your target form time being around 9-10 minutes.
For your first clear go from red to Krugs to Chickens. Followed up by Blue then gromp. Hit scuttle crab and then either gank mid or the side lane you are closest too. Your goal in the gank should be to kill, but to get pressure and collect orbs for form maybe even a flash or another sum spell. Then resume to farming in hopes to gank one more time pre-6 with the same mindset. After level 6 gank rapidly while farming in between camps. Get your blue form and focus on follow teamfights from the side to allow yourself to get onto the backline. Your goal should be to end the game pre-30 mins as Blue Kayn will fall off late and rely on the rest of the team. Your job is the backline and you can take all them on alone. Allow your team to focus frontline. If you would like to see this live twitch.tv/alayiak and on https://www.youtube.com/channel/UC86zqLLv4Rt2Pn27Z-R4hqQ. Hope this helps my fellow low elo players.