Loving what you do is a mix of two things.
1. Choosing the right thing.
2. Choosing to love doing it.
Choose the right thing.
Learn the way God has wired you, both in strengths and passions. What you are good at isn't always what you are passionate about. Finding where your strengths and passions intersect is a good place to start. But choosing the right thing isn't a perfect art, it's a journey. We get it wrong lots, we change over time, and we discover more over time. So the next thing is far more important.
Choose to love it.
Some people would be miserable no matter that they do.
Some people would love what they did no matter what it was (within reason).