Good questions. You only pay once - upfront The amount you pay is shown in the photo above (83.333 steem in the example for 5000 steem). You can adjust the amount you are willing to pay (your choice) to a lower amount. If it is too low, nobody will take your offer. If it is high, it will be taken quickly. As you don’t have much steem, you need to earn some, or buy some, or lease a smaller number of steem than 5000, but in my view, there’s not much point in leasing less than 500 steem.

You only pay the upfront amount. You don’t pay anything extra, like interest or fees at the end of the lease period.

What you pay upfront is not refunded.

My advice is to make sure the Nett APR is at least 39%, otherwise your offer will probably not be taken and you will need to wait two and a half days for a refund.