Because Instant Artist 1.0 is abandonware (software no longer sold or supported by the original publisher), it is not available on official stores like the Microsoft Store or Steam. You will need to rely on archival sites.
If you specifically have the Windows version of Instant Artist, you can use otvdm (WineVDM) , a tool that allows 16-bit Windows apps to run directly on 64-bit Windows. download instant artist for windows 1.0 64 bit
The single biggest hurdle in your search for is that Instant Artist 1.0 is a 16-bit application. Because Instant Artist 1