Far too many people put being happy to some distant future. They wait until they get the promotion or buy that house or find that perfect person. If your goal in life is to be happy, then realize happiness is a decision, not some destination.
Shooting for big goals is perfectly fine but if not having those things is causing you to be unhappy, then perhaps you need to be reminded that the future isn’t guaranteed. We all think we have decades left to live but what if it’s much shorter than that? We’d certainly be wasting a lot of our precious time not being happy and completely missing the whole goal of life.