Welcome to the exciting and highly-opinionated world of beekeeping.
First, good for you for doing your research and going to a bee club for information gathering. You probably know this, but the Flow hive is just a regular beehive with some fancy honey extracting frames, so evrything else you need to know about keeping bees remains the same.
We tried the Flow Light hybrid (traditional deeps plus 4 flow frames) for two seasons with little success and have decided to move to a full Flow next year. What I observed year 1 was that our Carniolan local bees primed the Flow frames and used them for nectar storage, but then moved the nectar out in the fall. No flow harvest. This year, we bought Italians and they also prepped the Flow frames and partially filled one, but the bees preferred the naturally drawn comb and avoided the flow frames. So, next year, we will not give them that option and instead have a full frame of Flow frames for honey storage.
Have you read this article by Hillary Kearney? She also has excellent beginner beekeeping online courses available, which I especially recommend if you are interested in natural beekeeping.
Hope this helps! You can visit my blog to find out more about our beekeeping adventures in Seattle.