These are two different questions. Even if life is hard you can still enjoy it, and 'easy' doesn't mean 'happy'.
Yes, life is hard, and it's no use pretending otherwise. There are just so many things that can go wrong and so many things we have to get right! And sometimes it can be so hard to get along with other people or even work out what we want ourselves.
But almost everything gets easier with practice - and life very often does get easier and more pleasant once you have experienced some different things and found out who you really are and what you should do with your life.
The best advice, I think, is: Don't expect too much; learn to enjoy small things; get as many experiences as you can while you're young enough; and don't let other people tell you what you should be feeling. Oh, and it may sound a bit basic, but get lots of air and exercise! It always helps.
Good luck.