I know the feeling of having a new tank with nothing moving around except water. My I suggest to slow way the heck down

get all of you parts in place, such as the sump and tank at least 60 day before adding in fish or corals. I would get some cleaning crew in there to help with building a bio load to that you blenny can survive. I will also get some garlic and vitamin M to help you blenny with all the stress that it is going to go through in the new few weeks while the tank finished the first part of the cycle.
My system is 16 month old and I added a sump 3 months ago. I am finishing a small cycle by adding the sump after the original setup

your tank will be cycling for at least a year with different levels. that is why they recommend an established system because change is harder on them. Nothing wrong, just from now on be patient and remember time is your friend with a reef. small adjustment and wait