What lighting are you using ?
At 25cm ( considering the rock at 10cm tall) it is very shallow and with 10hours of lighting period, soon you will battle algae issues.
with the limited height space, I would suggest you to do without those bulky rock. Keep those smaller rock instead for small fishes like goby to play ard or hiding.
for the rock scape, for starters, you can considering getting those common Zoas clustering type in palm size rock. This rock can act as your main scape rock. You will not be staring at bare rock also.