I really want to have windows phone 8.1 on my Nokia lumia 610 but is it possible to install the preview for developers app or windows insider on a lumia 610
Windows 8.1 should already be available for your Lumia 610. You don't need the Developer's Preview. According to this source, in order to upgrade to 8.1:
Step 1: Go to Settings > Phone Update and tapping Check for Updates.
Step 2: To start installing the updates, tap on the notification message and follow up the instruction shown on your phone.
Step 3: The update should usually take around 15-30 minutes, but a major update might take up to 2 hours to complete the installation process depending upon you phone model. You would not be able to use your Lumia 610 during the update procedure. You should answer all the update prompts whenever asked to. Don’t panic if the Lumia 610 restarts several times during the update installation, as it is quite normal.
As for Windows 10, according to this, there's no Insider's Preview yet.