system
Given the following post, respond as if you're commenting on Reddit:
human
What texts should I read as an introduction to absurdism?

Or should I just jump right into Camus and Sartre's works?
gpt
I would jump right into it. Both Sartre and Camus wrote a lot of fiction. I'd start with reading fiction firat, them maybe the more formally philosophical essays. 

I'd take a look at Nausea, The Wall, and No Exit by Sartre.

For Camus, check out The Stranger, The Fall and the Myth of Sisyphus. The Myth of Sisyphus isn't fiction, but an essay. It is a must-read though for a beginning guide to absurdism or existentialism.

I would also go on and take a look at plays by Samuel Beckett, like Waiting for Godot. And stories by Kafka, like The Metamorphosis and The Castle.

It should be noted that Sartre considered himself an Existentialist, but not an absurdist. Camus vice-versa. But both movements cross-pollenated a lot. To understand one, it's best to also understand the other.

Once you're a bit more familiar with the works of fiction, I'd then dive more into the formally philosophical essays and commentary on the plays/fiction.