There's no perfect strategy to finding your purpose in life.
Everyone's path to finding purpose differs and the time at which we all get to discover our purpose also differs. Some are opportuned to find it in the early stages of their lives, while some of us discover it much later.
But do not live life worrying too much about finding it¹.
Live in the present, do things that keep you busy and productive, do things you enjoy. When you find it, you find it. Until then, live life in the present and live it fully.