So you bumped this are you looking for advice?
I would say, you should remove the stickers.
The hornwort will also work as a floating plant. If it starts to die back and become brittle you may want to float it.
The java fern will not last with its rhizome buried it needs to be attached to the wood or rock.
If you are looking for rooting plants like swords you’re going to need a little deeper substrate.
You will probably need to add some root tabs either bought or DIY for any root feeders as well.
I would also recommend you think about different stocking as you move forward.
The dat is going to be too big for this size aquarium.
I’m Not trying to discourage or be to critical, just trying to give you some solid advice for your own success.