I don’t think that a temporary experience of visual impairment gives an accurate portrayal of another person’s point of view. Sudden temporary impairment might simulate some of the worst symptoms of sudden onset blindness such as disorientation, fear, panic etc. But you will know its only temporary, and yet will not experience later acceptance, confidence, and security that other visually impaired people gain.

As someone with low vision who spent 5 years on the edge of legal blindness before finally being declared, followed by years of loss of vision off and on, I appreciate your desire to understand, but I don’t think anything temporary will give you anything but a tip of the iceberg experience.

Being blind is a 24/7 thing. We eat, sleep and live with it. We go to work, raise families. Something that pissed me off about being blind ten years ago can be a non-issue now. Or it can still bother me every time I leave the house.

Plus, my blindness isn’t like anyone else’s. My diagnoses might be the same, but I have my strengths and challenges, and they’re different than someone else’s.

The empathy and curiosity in your question is great; the concern would be that you would project your temporary blindness onto others who have it permanently: "I felt helpless and disoriented, so imagine how awful someone must feel who is blind all the time!" For this reason, some blindness advocates are against this practice as it risks misrepresenting the community, and /u/Uatu71 is right to advise a lot of caution in equating blindfolds or special glasses with the lived experience of visual impairment.

From a neuroscientific perspective, people who have been blind for a long time don't just have more practice in getting around without vision. Their brains are often adapted to process sounds and touch in ways that brief deprivation can't duplicate. (Abstract example: What we call dark is the absence of vision; it might not even make sense to say that blindfolding yourself gives you the same basic sensory experience as someone who has never seen.)

Having said all that, I think the general experience of relying on your nonvisual senses is actually pretty valuable! Just bear in mind the many caveats about considering it a mile walked in a blind person's shoes.

Low-effort start: It's a little janky, but if you can get past the nagging popup messages, an organization called See Now takes you to any Google Street View, but filtered through one of three reasonably rendered possible visual disorders (adjustable in severity): https://simulator.seenow.org/

Edit: another low- to medium effort option is not necessarily blinding yourself, but getting used to using your phone's accessibility features. Got an iPhone? Turn on VoiceOver and see how quickly you can use it without ever turning on the screen, and how high you can crank your text-to-speech speed. That will familiarize you with an aspect of many blind folks' everyday interaction with the world.

Molly Burke has a video of these glasses on YouTube and people wearing them.