Lots of ways to select an edge ring, including:
- Select an edge with ctrl shift click, the select the next edge in the ring with ctrl alt shift double click.
- Turn on edge filter and select an edge with click, then the next edge in the ring with alt shift double click.
- Turn on edge filter and area select across the ring (easier with bottom right to top left option.
- Use the edge ring selection command
a.k.a. SelEdgeRing.
Incidentally, the edge ring selection command will select all your new vertical edges if applied to the bottom ring of your model (but it doesn’t grab the horizontal ones). Quick way to crease all those new faces before the next extrusion.
Regards
Jeremy