what the hell going on

thanks for give your precious time

nikal pahli phurasat me tay ab gyan batawat bahu tu

I have allready done with quickview functionalty but inside i have dropdown color and size but i want it to convert like swatches color and size but i am unable to do itif any one have idea about it please share me suggestionhere is the screenshot 

Please Help how to change quantity selector of cart page in plus minus when i click plus icon it change the quantity but not change the subtotal of product how can resolve it Thank

 I am a beginner I have no idea how to display custome app content in shopify  home page Please if you have any idea please suggest me