Those fauna won't uproot your plants but a bigger concern is making sure your tank is fully cycled. Don't add any fauna until it is so (if you go the fishless cycling route which I would recommend). Adding just 2 otos would be a start but give it some more time, maybe two weeks.
I like the tank, not too crazy about the background image though. Nice driftwood in there, should give the shrimps a nice place to hide.