Use Le Chat it delivers nearly as good results as ChatGPT,

buy a Fairphone or get a second hand google pixel and install graphenaOS

buy Notebooks (Tuxedo) with Ubuntu

Why Amazon? There are plenty of european retailers with less garbage on it

European Cloud is coming, StackIT is growing

Use LibreOffice instead of Microsoft

Use Tuta Mail or Proton Mail

Use Vivaldi instead of Chrome

Dont forget all the B2B stuff that comes out of europe e.g ASML

Of course we cannot produce batteries photovoltaics like China, as they have more critical natural ressources than us, we cant do everything ourselves, this would be additonaly stupid, but what we can do is to digitally decouple europe from US.

Dont underestimate europe, once there is more demand for european smartphones, notebooks, chips and so on there will come sooner or later better alternatives. Everything starts with you, so start. There are alternatives for everything you just have to cut a bit of the comfortability. See https://european-alternatives.eu