I agree that the most important thing is to protect your eyes and ears. You can buy goggles (safety glasses). They prevent metal from striking the eyes. As for ears, I agree with the post above, hearing protection for musicians might work great for you. Just choose the proper earplugs and your hearing will be safe.
If you are grinding metal , pounding ,or cutting metal or just in the shop make it a habit to wear gloves and eye protection . And if you like music ear protection might be nice .