Pond Megastore (PM) is in eastern Ohio and Texas water lilies is in TX. Since you are first putting the lilies in hanging baskets, I would first buy medium sized or the small variety lilies. If you are first putting them in a large tub container then you can buy the large lily varieties. Maybe buy one medium and one small for beginners. I looked that PM selection and here are some suggestions: Attraction is easy to grow, Miss Siam is bright pink, Greg's Orange Beauty, and Colorado. For the small lilies at PM look at Perry's Baby Red, Citrus Twist, Little Sue, Pink Sparkle.
PM has mixed reviews - but ordering early is best.
https://davesgarden.com/products/gwd/c/4522/0/#bTX Water Lilies
For medium and smalls see Attraction, Colorado, Perrys’ Baby Red, and a dwarf lily is Liou.
PM is more expensive than TXWL but PM has a bigger selection of lily varieties.
Videos are helpful for planting. Remember plant the rhizome at an angle and keep the growing tip a little exposed out of the soil so sprout tip can quickly begin growing. Don't use potting soil as it is not firm enough to keep the buoyant root from floating out of the container. Use garden dirt to first plant the lily. Maybe a little lily fertilizer to get the lily growing well. Then transplant into the pond after 3 to 10 months.
Planting Lily
https://www.youtube.com/watch?v=BDPnM--9it8Repotting Lilies
https://www.youtube.com/watch?v=-rYB2_ZOKo0
