Id you're interested in working with EEG, the advice of the other poster is worthwhile. I've transitioned away from EEG as I don't believe it's a future-proof technology. I got into the field through a series of lucky internships during university and a whole lot of networking got my resume into Neuralink before the destealthing last year. My advice is to apply everywhere you can, be passionate, and reach out to people. There are more opportunities out there than you think.