Hello, I would like to transfer the internet service via fibre optic cable using a media converter. Is this diagram correct?https://imgur.com/a/EhzPunv
With many types of MikroTik routers and switches you can place the SFP module directly in the router or switch and save the media converter.
You may be able to upgrade the MikroTik device for the price of the media converter.
You also missing the pigtails of the fiber ends.