ChrisFix is one talented YouTuber. He’s a little camera shy, but extremely diligent in producing comprehensive DIY guides for all things automotive. Even if you’re not someone who has the time to work on your own vehicle, he can offer a lot of insight into how many common problems occur and can be solved for cheap.
In his latest video, he goes through all the common reasons why brakes can start squeaking. This covers both new and worn out brake parts, so there’s likely an answer for your particular brakes.