Hi, the Lumia 630 (and other unsupported phones) have now been dropped from the Insider programme and as such you will not be able to install Windows 10 mobile via it.
Also no 512MB phones (such as the Lumia 630) are now supported.
Current supported phones are shown below.
https://www.thurrott.com/mobile/wind...nsider-program
There is a way to force the update via a registry hack (see below), but it isn't recommended and may brick your phone.
How to upgrade an unsupported phone to Windows 10 Mobile • PUREinfoTech