Create a new property in the collection called “likes count”. Obviously it will be a number property.
Add click action for likes.
Click action will be “update collection” for likes count.
Magic text will be “likes count +1”.
Add in a text box next to the likes. Make it a list as I did it in the video and magic text will be likes count.
I think I helped all I could without seeing your collection or app screen. 
You have to post screen shots of your collection if you want more help.