As you are still a newbie without any smerit, you will always see 0 received merits and 0 sendable merits. Merit received will determine merits you will be able to send.
For every 2 merits you received, you will get 1 merit to send to any post you think it deserves it. The number of merits to send is the half of the number of the merits received.
I have sent you 1 merit point for this topic, once you receive another point, you will be able to see that you can send 1 point to a post of your choice. There is no restriction for newbie to send smerits if he owns them.
I insist you to check threads mentioned in previous comments to learn about how to earn merit points, as you have to receive some so you can send some.