You can also keep your histogram open throughout to understand how your adjustments affect the tonal range of your photo.
A good way to check if you have too much contrast is by checking areas in your photo with a lot of detail; if it’s too contrasty, those nuances will be lost. Your post-processing software will also give you a heads-up if you’re clipping your highlights and shadows, so watch those warnings. You can also keep your histogram open throughout to understand how your adjustments affect the tonal range of your photo.