When working with any laser above class 1, you should seek appropriate qualification for dealing with your specific laser system (which includes both its wavelength and its power), and you should inquire with your institution as to any formal safety requirements.
Specifically, you should not take laser safety advice from what are essentially random strangers on the internet, and certainly not without verifying it externally with a qualified professional.
A good place to start looking for information is the manual of your laser system, which must include a safety section which sets out clearly what is and is not appropriate protection equipment. Laser goggles will correspondingly have specifications which you need to match carefully to what your laser system requires. Do not, however, assume that normal glasses will work appropriately as laser protection, without checking with a qualified professional.
For a home-built system, you obviously need to proceed with extreme caution. Unless you are completely, absolutely sure that you will never have more than 1mW power in the beam (hint: you're never sure), you cannot dispense with safety equipment.
One thing you should be particularly aware of is that in the infrared, your blink reflex won't protect you. This means that there is no such thing as a Class 2 infrared laser, and you should therefore assume, at the very least, that your laser is Class 3.
I should stress, again, that it is nothing but reckless to take safety advice off strangers from the internet. Similarly, if the online resources you are using to build your lasers don't have a clear section on laser safety, I would advise you to stay well away from them.