So sorry! Missed your question!
Do you already have a square account?
If not here is a sign up referral for $1000 free processing within 180 days of account set up https://squareup.com/i/3A892D7A
If you signed up on your own already you should be able to just order a reader on the bottom left of your square admin!
Also, I highly recommend comparing amazon prices against square’s prices for the upgraded chip reader.
When I got mine last year the chip reader stand (nice heavy weight to it) and chip reader were cheaper than through square!