The Quest 2 is not designed for the visually impaired. It can take quite a lot of configurations before it becomes comfortable and usable.
Wearing Glasses In The Quest 2
If you're a glasses wearer you already have everything you need, making this the most cost-effective solution. The Quest 2 comes with a spacer that needs to be inserted behind the padding to help make room for your glasses. You can also buy oculus quest prescription lens through various online sources.
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It's fairly easy to attach: first, bend the arms of the strap up and out of the way so that the foam padding is easier to detach, then grab the padding from the top and pull directly away from the headset.
Next, you'll need to secure the spacer into place by pressing firmly in the sections that align with the center of your forehead and the bridge of your nose. The foam padding will then attach on top of the spacer in the same way, and you're done.
Wearing Contacts In The Quest 2
If you can wear contacts this is by far the best solution with a few minor caveats. The main concern for contact lenses is sweating. The foam padding that comes with the Quest 2 is comfortable, but it's not going to do much to help with sweat.
Playing VR is often a very physical experience and if you work up a sweat you may have a problem with your contact lenses absorbing that moisture and becoming very uncomfortable.