Q.Transplanting and dividing irises
I live near Burlington, VT. I have an overgrown bed around some birch trees. Many things were planted there and have grown together. The soil is root bound and dry all the time. Small deep purple or black irises grow there and should be divided. I am somewhat limited when it comes to gardening, for one thing I cannot kneel due to having 2 knee replacements. The only time of year when I can get past other plants and separate or dig up the irises is now, in the spring. Soon the bed will be overgrown with cranesbill geraniums, lupines, honeysuckle (sorry), phlox, a few daisies, some hostas, daylilies,and others I haven’t identified. The irises are an inch or two out of the ground now. Could I pull these out and divide them now and put them in another bed? Will they die if transplanted now? Will they bloom if transplanted now.? I have lived here 8 years without touching these poor plants. Occasionally I water and feed them Shultz’s plant food and that’s about it up to now. And how much sun do they need each day?

Spring is an excellent time to lift and divide your Iris.
I'm doing the same in an area of my garden!
Here are some links that will help you!
Just a suggestion; if you have a local Garden Club, perhaps some gardeners would be willing to come help you dig up the Iris and you can reward them with some plants
for their own gardens!
https://www.gardeningknowhow.com/ornamental/bulbs/iris/dividing-transplanting-iris.htm
https://www.gardeningknowhow.com/ornamental/bulbs/iris/divide-bearded-irises.htm
https://www.gardeningknowhow.com/ornamental/bulbs/iris/storing-iris-rhizomes.htm
https://www.gardeningknowhow.com/ornamental/bulbs/iris/iris-plant-care.htm