Socialism is a challenging ethical conviction to practice in a world where a handful of large, greedy corporations monopolize every life area. Digital assets are the easiest but already steep challenge. Purism, the ecosystem it ties into of GNU/Linux apps, and Brave Search free me from Google, Apple, Microsoft and Facebook. The public domain and cc0 creators provide the music. Amazon is way harder to replace because I rely on them for physical goods that can't be infinitely copied.
a start:
* huel.com - vegan foods
* https://ethical.net/technology/amazon-alternatives-guide-how-and-why-to-avoid-amazon/
* https://www.joeyoungblood.com/technology/alternatives-to-big-tech-companies-that-are-smaller-more-independent-or-less-monopolistic/
* beginning list of local small businesses: https://www.shop49th.com/previous-businesses.html
* another beginning list of local small businesses: https://www.907bookkeeping.com/resources/local-alaskan-businesses-you-should-support-during-covid-19
Buying only from nonprofits or government, or at least social benefit companies like Purism is ideal, but (preferably local) small businesses are a lesser evil compared to international chains.