This one for example looks like well rounded and user friendly option.
Would anyone care to comment about this?
Swift Forth is literally a professional Forth and is well regarded. The other often recommend Forth is the FOSS GForth. They are good for starting because they are popular and standard, so you'll find help easily.
Other "smaller" Forth are often non-standard dialects and are more-or-less mature experiments.
After all half the fun of using the language is writing your own interpreter, and it's very easy to do on constrained hardware/systems.
if you are working with specific hardware (e.g. microcontrollers) it depends on which forth dialects are available but for the raspberry pico and pico 2 I recently found zeptoforth [1]
or you know you can always bootstrap your own :)
[0] https://gforth.org [1] https://github.com/tabemann/zeptoforth