Following your bliss is a recipe for paralysis if you don’t know what you are passionate about. A better motto for most youth is “master something， anything”. Through mastery of one thing， you can drift towards extensions of that mastery that bring you more joy， and eventually discover where your bliss is.
The joy of mathematics lies in the journey of discovery, not just the destination.
Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work.