Getting rid of unnecisary faces

How do you get rid of unneeded faces in blender? I’m still really new to the program so I’m pretty much helpless, and I can’t find it in the manual. Is there any way to extend edges from verticies, too?

Thanks in advance!

to delete a face, select the points that make up the face and press the delete button, then faces.

to extrude anything, select it and press E.

To make a face or an edge out of points, select them and press F.

X is a delete button, btw. You can do most things with your left hand on the keyboard and your right on the mouse.

dont forget that when creating faces that a face can be made with only 3-4 verts.