To complement the Pharo recommendation, I would also recommend cuis smalltalk.

It also forked from squeak, but went on an aggressive diet, shedding much complexity in the base image, and modularising (using git) much of the rest.

Smalltalk newcomers may find cuis is easier to "digest" and get to grips with. Having used pharo and squeak myself, I find myself preferring cuis for more serious development. YMMV.

- full instructions on install & first steps at [main cuis repo](https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev)

- ["The Cuis Book"](https://cuis-smalltalk.github.io/TheCuisBook/index.html)

- [cuis docs repo](https://github.com/Cuis-Smalltalk/Learning-Cuis)

- [cuis related repos on github](https://github.com/search?o=desc&p=1&q=cuis-smalltalk&s=upda...)

Not sure about any other implications, but you could check out Pharo, which is much more active than Squeak development.

I have been working with Squeak for many years. It's stable, evolving, and always interesting. I'm also a big fan of Cuis, but Squeak is still my personal favorite.

Neither Squeak or Pharo have well maintained website and searching for documentation via google is very hit and miss. Pharo is worth downloading and playing with though. The old, main commercial implemention of Smalltalk is available through Cincom. VisualWorks was just about to take over the object world before Java was released:

https://www.cincomsmalltalk.com/main/

I have been blogging about it recently here:

https://smackeyacky.blogspot.com/

I noticed the same thing too, I just ended up copying the link and they work just fine.