Share your experience!
Can you post a screenshot from Settings-apps-running?
Take the screenshots > once you are back to this site > scroll to the bottom > full version > then add them, or an easier way, upload them to box, dropbox, google drive, etc and post the link here
Well, lollipop is quite demanding and the device has 2GB. You shouldn't worry about RAM memory because Android doesn't work like Windows. When it needs memory, it automatically closes apps.