Nothing serious will happen as You would disintegrate!
At the temperature of the Sun, most of the molecules that make up our bodies could not even survive, that is why we would not only fry and die, we would really disintegrate.
Even the sun's coldest surface still burns at an insane 9940 degrees Fahrenheit. You will melt down from a very far distance!
The Sun is a fluid mass with no solid surface, meaning there is nothing really there to walk on. You would sink. But you cannot even sink as you will melted down from 30° to 40° C.
Panjr moddhe para diye sun bolish :) chop