Well, since it seems to actually start I would initially suggest to run Amiga TestKit on it, but that's gonna be difficult if the drive isn't working properly
The thing is, if the disks you're trying are old they might just all have gone bad. That the drive is making strange noises could be just because the drive is doing what it can to try and read them. Also, some copy protections and such made the drive sound strange when loading so it's not certain that the drive is bad.
If you know someone that has an Amiga and can create a disk with AmigaTestKit for you on a known working disk that's probably the easiest way. If not, it's gonna be a bit difficult to get things going.
