Ursula said: I had to look up Phrag richteri. It is a natural hybrid of boissierianum × pearcei.
Easy to grow? Maybe. Let's just say I have seen pearcei in Ecuador/in its habitat. I was smitten with it and was hoping to duplicate its natural condition, on river banks and sometimes totally submerged. I bought a plant. 6 years later - never saw a bloom. Is the hybrid easier? Hmm.
Phragmipedium richteri would be a good one to get. I always think if you are a total beginner who hates losing plants, then get a hybrid first, then jump into species plants.
I keep them in a semi-hydroponic situation all year long. See pictures. I have to do this because my environment is so arid. If you are in a humid place with plenty of rain, you will not need to do this unless it is your choice. This is a Grande cross so it is big. The inner jar is a mayonnaise jar, and the outer jar comes from hobby lobby. Change out the water every week in warm weather. This is filthy because it gets algae on it. Kovachii is a plant that is totally different as far as phrag care. I have had two and killed both quickly (within a month).
I have a few rules I follow with both phrags and paphs. Never buy a seedling. Save your money up and get a mature plant. A reputable grower can tell you how old a plant is. They will die incredibly fast if you get a seedling. Paphs especially will die fast as seedlings. (Cattleyas on the other hand are okay to buy that way). Rule 2 is get your plants from a reputable grower (not a drop shipment e-bay guy). Know the difference between a grower and a backyard breeder, and a seller. I'm not rich and have gotten several divisions from Chuck Acker, including one of his own plants.
Watch/listen to Norman Feng, and also Ed's Orchids on YouTube. They know a lot about culture.