The bubbles clinging to the sand will eventually dissolve. You can also gently stir and poke the sand with, say, something like a bamboo skewer to help get rid of the air pockets. The sand on the glass should fall if you swipe it with your finger. I can't tell, but it looks like you have an anubia in the front left of the tank. If so, you need to get the rhizome above the sand or it will rot. Kinda looks like you may have more than one, they all need to have the rhizomes above the sand or they will rot. Good luck with it all.