When making pictures of the sun and during a totality it's important to have the right settings. You can experiment yourself upfront with the sun high in the sky and using your solarfilter. Try out shutter speeds from 1/8000s -1s for different ISO numbers and f/stop numbers and see what's the best result. As long as the sun is visible this setting can be used. During totality settings need to be adjusted and without filter.
For more information see this calculator or see below chart for settings during totality and what detail (chromosphere, corona,..) you want to photograph