I would second the opinion about getting a couple old boxes and learning as much as you can yourself.
This will give you some basic knowledge, you can learn it all in your spare time almost for free.
The days of free apprentices were relevant in the dark ages, when there was no information freely available online. There are things that you can only learn directly from another luthier, but if you are a complete beginner, you'll likely waste your precious tuition hours on something very basic (just because you've never done it before and everything is new & difficult to you).
Once you've had a go at a few boxes yourself, you'll get the idea if you like this type of work, you'll get some feel for how long things take and how much you'll actually get paid per hour of this work, and then, if you want to crack on, you can attend a course and fill the gaps in your knowledge.
This will give you some basic knowledge, you can learn it all in your spare time almost for free.
The days of free apprentices were relevant in the dark ages, when there was no information freely available online. There are things that you can only learn directly from another luthier, but if you are a complete beginner, you'll likely waste your precious tuition hours on something very basic (just because you've never done it before and everything is new & difficult to you).
Once you've had a go at a few boxes yourself, you'll get the idea if you like this type of work, you'll get some feel for how long things take and how much you'll actually get paid per hour of this work, and then, if you want to crack on, you can attend a course and fill the gaps in your knowledge.