Never look at the sun without proper eye protection. You can damage your eyes permanently. This is not to be taken lightly. Okay. So what are some options for viewing the sun. There are two primary ways to view the sun: projection and filtering.
Projection involves having a solid sheet (cardboard is often used) with a pinhole punched through it. If you hold the card up and look away from the sun, an image of the sun comes through the hole and can be projected onto another card.
Filtering involves looking directly at the sun through material that filters all but a hundred-thousandth of the suns light and all the ultra-violet and infrared rays. The standard for this is labeled ISO 12312-2:2015. Inexpensive glasses that meet this standard are available here.
Another possibility is Sunoculars – binoculars with built-in solar filters. These can only be used to look at the sun. Other than during eclipses, I use mine to look at sunspots.
During totality, it is safe to look directly at the sun. In fact, if you keep the eclipse glasses on, you will miss the main show. As soon as the second diamond ring occurs, put your glasses back on.
There is more detailed information in my book: Go See The Eclipse.