There are very few jobs for niche technologies, you might end up not finding any you like or where you would be accepted. If you want a job, you must sometimes pick something that is less interesting, but actually used in the industry.
> look for jobs that use the techology you want to learn, then apply for a junior position
You would lose to a candidate who knows anything about the technology. There are tons of applicants for junior positions, and someone who doesn’t know a thing is at a disadvantage.
There are very few jobs for niche technologies, you might end up not finding any you like or where you would be accepted. If you want a job, you must sometimes pick something that is less interesting, but actually used in the industry.
> look for jobs that use the techology you want to learn, then apply for a junior position
You would lose to a candidate who knows anything about the technology. There are tons of applicants for junior positions, and someone who doesn’t know a thing is at a disadvantage.