I can't seem to get Smoothing by Loop Cutting very well I was making a bridge but while smoothing with loop cuts, I just cant add loop cuts (on the blue part). I tried inverting the normal behind the faces(in the second pic) but it didnt solve it. I also tried to delete the faces and do them manually but i still cant add loop cuts and also increases the amount of loopcuts needed.
*Note: Note sure if that's needed, but i have a mirror mod on too.




It's the first project im trying by myself(out of my own imagination), so i dont want to be discouraged...
Nevermind i fixed it by deleting the face and used triangular faces instead. This let me add the loop cuts.