They are so CUTE!!! Put them in gently....I take a cup of water (from one of the buckets) and keep it sitting with them....drip water VERY CAREFULLY (after checking ph) on the little plugs. You may only have to water once a day for a few days. It's VERY wise to check and adjust ph any and every time you add something to the plants...even that cup of water that you know the ph was correct on before. Just don't let the plugs completely dry out. You won't have to use the drip ring for several days.

Your drip ring setup looks good. Good work there. How tall is your flowering space?