You can remove edges and vertices by going to edit mesh, delete edge/vertex. Ctrl-Del for a shortcut.
To fix a hole in a shape, select the edges, go to edit mesh, then select bridge to fix the gap
Symmetry is the quality of comprising exactly similar parts facing each other or around an axis. This series has a line of symmetry through its centre”
The mirror tool can make a shape symmetrical. Go to mesh, select the box on mirror, select object on mirror axis position, change mirror direction to +, press apply.
I modelled a teapot in Maya
I made a cylinder, made edge loops around it, scaled them out to match the shape of the teapot here:
Here, I drew a line using the curve tool, made a cylinder and aligned it to the start of the curve, selected all the faces, pressed extrude, and changed the number of divisions to make the shape more curved.
Here, I applied material to the teapot and applied blinn to it and adjusted the settings; I coloured the teapot a different colour; I added a floor plane to it; I added a skybox using the skydome light; I applied a kitchen HDRI image to replace the default skybox, and then I rendered it.
Final renders:
