I lost my chance to study something I consider worthy.
What do you consider worthy of studying?
I could have become an architect if I had studied the right thing in school.
It's really too bad that did the wrong thing in school and lost the opportunity to do what you want to do. Try not to let these kinds of opportunities get away from you in the future.
I should be able to change it but I'm too late to do so. All there is left to do is to study something else, it's not like I love it...
I think you can learn to love whatever you plan on studying next!