Success is loaded and fluid concept. It can be defined in so many ways and it can change as you mature. How one person defines and measure it may be different for another.
To attain success in your life, youfirst need to define it for yourself, on your own terms.
If you don’t, you end up striving toward goals that don’t fulfill you, that don’t match up with your own values. You’ll end up living the life you thought was expected of you rather than the life you want. And be miserable.