I'm currently studying a degree that isn't very common across the country, but I'm struggling to find a placement that suits the field of work I want to go into. However, there are placements in the IT sector, but this isn't the best option for me. I was thinking of finishing my Bachelor's degree and then moving on to a master's. Any opinions on this?
Generally speaking, the less experience (both industry relevant and work in general) you have, the more beneficial a placement will be. However there's no real downsides to doing a placement, as the experience on your CV is unlikely to be a bad thing.
Your placement doesn't absolutely have to suit the exact field you want to go into. In theory, since you're still studying a degre you should struggle to find relevant placements. If the first two years of uni were enough to prepare you for an industry job, there'd be no reason to do the third. A placement is unlikely to mimic a graduate job because you technically are not qualified.