Susan, the best for the money, you would want a Harris Bipod. I highly recommend this adjustable model : budsgunshop.com/product_info.php/products_id/81119/harris+bipod+adjustable+height+from+6%22-9%22

Here is a great article for bipod selection.
pewpewtactical.com/best-ar-15-bipod/
For your specific rifle, I would recommend Harris Engineering 1A2-BRM Solid Base 6-9-Inch BiPod
The reason is this.
1. Harris is a very reliable company that has a proven track record. The m40 sniper rifle used by the USMC uses Harris bipods.
2. Inexpensive... Shooting is all personal preference. If you're going to use something and test it out. Why buy the most expensive just to see if it works? Often times, cost doesn't equal quality. For what you'd need, those would be more than enough and it wont cost you an arm and a leg

Hi,
I know many people who use Caldwell bipod with their Mossberg 22. Not the best bipod in the world but not bad either (rather affordable).
Cheers