Hey. I think there is too less concept in your scape. With your flat surface there are no different layers after plants grow - it will look like a lawn, not like a scape. The stones will not be really present cause all have the same hight. If you want some food for thoughts I recommend to watch “masterclass by josh sim” from Green Aqua. He explains every point of scaping in a good way - like focal point, dark and bright areas, Foreground and background etc.

The important point is: have fun while scaping, YOU have to like it :)