Liara Forth is an ANSI-orientated Forth for the W65C265SXB ("265SXB") single-board computer that will work with out of the box as a "first Forth".
The 265SXB is an engineering development board -- roughly like the Raspberry Pi -- produced by the Western Design Center (WDC). It is based on the W65C265S microcontroler, which in turn has a 65816 microprocessor (MPU) at its core, the 8/16-bit hybrid "big sibling" of the famous 6502 MPU that powered classic computers such as the VIC-20 and Apple II. The 265SXB is one of the easiest ways to get started with a 65816 system.
This project is currently in the ALPHA stage. ALPHA means that "pretty much everything is there, and some of it even does what it is supposed to". Use, as always, at your own risk. There is further information docs/MANUAL.md .
There is a discussion thread for Liara Forth at 6502.org.