Apparently, good writers are scarce these days, and "Erin and Aaron" is a proof that Nickelodeon couldn't get anyone for this uninspired, lame show.
It's hard to find an intelligent line in this show composed by sketches already done before a hundred times. Instead, the show is filled with stupid situations like the little girl successfully bribing her art teacher with banned cookies to be granted with an A+ grade and other examples I prefer not to describe fully here. It's also really sad to watch Larisa Oleynik reciting dull dialogues and I can't understand why some so called writers find funny to include a boy with crutches just to mock at him.
As to Ava Ro, I can see she's got some talent for comedy and can sing a little, that's why it would be better for her to quit this nonsense and pursue some really worthy projects (see Olivia Rodrigo, she starred in a terrible Disney show and now she's got three Grammy Awards). The rest of the cast is like... nothing to see here (Sorry, Larisa).
Finally, I strongly advise you to skip this show. Nickelodeon won't give your 25 minutes per episode back and you should spend that time watching a real comedy instead.