Is it risky to use my eye if I need glasses? I obviously need glasses but I haven't been to the eye doctor as yet.

No. No, But if you need glasses, it will certainly help your vision. Let your eye doctor help you with correcting your vision. Glasses are a natural first step. Good luck. .
No. If you need glasses and continue to strain your eyes without them you may develop headaches or some other symptoms related to straining your eyes and your eyes will continue to worsen but going without glasses is not risky in general except when you are driving.
No. There is no risk to using your eyes. If you have uncorrected refractive error (i.e. need glasses) you might strain to focus but this will not damage your eye in anyway.