Hi!
Nice work! I would say that your tuning is pretty good! I paticularly like the way used vibratos!
The only criticism I would have is actually more audio mixing related: I feel like the instrumentals drown out the vocals a bit, mainly during the chorus. This can be compensated with a bit of volume automation (
here's a great video explaining the process). Fair warning it can be a bit tedious but I think it pays off.
Other than that, I would say that overall this is a great cover! Keep up the good work!