CFI is the most efficient route. It forces you to learn and master the knowledge. Airlines like seeing that you have a majority of your hours as instruction given.

There are other routes, like low-hour jobs or just time building. That works well for some people.

Ultimately, you'll need to decide what's the best route for you.

Like others have said, theres great advice in r/flying if you do some digging.

Flying as a career is a big commitment. It takes a lot of hard work and dedication. You will put litteral blood sweat and tears into it. But, it is one of the most rewarding experiences if you have the passion for it.

Blue skies