2011 EC250 transmission issues

[Michael D.]

Hi everyone,
I?m having some problems with my bike and am hoping someone can help me diagnose the problem.
It all started out when I started hearing a rattling sound from the gearbox when I pull the clutch in, but no other issues.
Then I couldn?t even shift into first gear unless the bike is moving. Also clutch lost its power and isn?t doing anything.
I switched out the gearbox oil And it was full of little metal particles, something I?ve never seen before when switching out the old oil. So I think maybe something moved and is grinding in the gearbox.
Does anyone have any clue to what?s going on in my gearbox. Hoping I can fix it myself but maybe I?ll have to take it to a mechanic.
Thanks!