Breakdown of step 4: 4a) Log in to coinbase 4b) click Transfer (upper right) 4c) click Send Crypto 4d) type in the amount 4e) Click on the "To" button, 4f) Copy and paste the address from "receiving address" in the Trezor suite to the spot that says "phone email address or invoice" It knows what an address is. 4g) click Preview Send, double check that the address is correct. There may be a way to display the receiving address on the Trevor screen (not sure but that would be a good double check). 4h) finally click Send now.
Next steps? Write down the seed phrase. Reset or completely clear the Trezor. Enter the seed phrase to restore the keys. Look for the bitcoin address on the Trezor (probably in Trezor Suite) that you sent as your test ($10 worth). If that doesn't work then don't do a large amount.
Thanks again.