Q.elephant ears
I bought some elephant ears last year that had very small stems and would not stand up. I have seen other ones that have very thick and sturdy stems. Can you tell me some varieties to look for? Thanks.

Some favorites; Black Magic, Midnight, Elena, and Mojito.
There are many different varieties available, along with different size bulbs and thus plant size.
It may be easier to start with smaller plants.
Here are some links to help refresh you on the care requirements.
https://www.gardeningknowhow.com/ornamental/bulbs/elephant-ear/growing-elephant-ear-plants.htm
https://www.gardeningknowhow.com/ornamental/bulbs/elephant-ear/elephant-ears-taking-over.htm