You've got the most important factors: interest and willingness to learn. If you want to get a job in this field, make sure you turn the interest into passion. Next, make sure you know the stuff. This is the hardest part because it requires very specialized knowledge. Finally, the master's degree. If you're good enough, you can enter any field without a degree. But formal degrees help to open doors. My personal opinion: go for the master's! And even further: consider a PhD. It is an experience that teaches you so much more. Do it out of passion, not for a career chance. But that's just my personal opinion