Second post today! So many questions!

I have had the same tank for a few months with cherry shrimp in them, I recently bought new plants at the store but not sure if I should take out of the plastic container they come with? Or do I leave them as it is?
Also, by the size of the plants and pots, do you guys think I need maybe some more gravel?
I could potentially (Covid lockdown) go down to the same store I bought the one I’m currently using or I could buy some online, whichever it is, would it be safe to do a change or gravel all together? Do I need to do this gradually?
Thanks so much for your help. Picture attached.
