It is important to note that the more you cook the meat, the firmer it becomes, press your thumb gently on the meat, how much it pushes back to you, is how hotter the protein cells have expanded which means the more well done your meat is, for a medium-rare steak it should have a soft feel with a little spring back.
Find it online: https://blogchef.net/how-to-cook-tri-tip-steak-on-stove/