The picture with the shadows brought up looks much better. Look at all of the detail that can be seen now! Sometimes bringing up the shadows with turn stuff gray but you can try to balance that out with adjust the blacks or manually going in with the adjustment brush to darken your desired areas. The best thing to do is go on Youtube and watch different videos on what you want to learn. I'm constantly learning new things and going back to edit old pics with new and improved techniques and experience. Keep at it!
I'm a newb myself but you will get a lot of help and great advice here.