Not necessarily.
Does it really matter, do i ruin privacy if i download full node without Tor? If its really matters, will it work if i uninstall then do reinstall and setup bitcoin core to run over Tor and download prune node instead of full node, since for EPS prune works as well ( my goal is to set up Core to run over Tor and use Electrum with EPS in order to use Trezor)
?
Well, yes. Since you're running it on clearnet, whoever is monitoring your traffic (ISPs) would be aware that you're using Bitcoin. However, this doesn't necessarily leak any privacy as nothing sensitive is transferred over clearnet during IBD. Pruned mode or not, it'll download and verify all the blocks. There is no difference in the time taken. If you absolutely need privacy, I'll rather just run it through Tor.
Can you please give your opinion on this too? Is this step necessary for privacy, if yes can you please tell any secure source where i can find those nodes? The article gives several nodes but i rather use nodes found from some legitimate source.
No. It is far more dangerous for you to specify a preference of nodes for the client to connect. There is no reason why you should trust us, or any website to provide you with a list of non-malicious nodes. DNS seeds are used only when necessary and Bitcoin Core already attempts to diversify the nodes that the client connects to. Bitcoin Core does have countermeasures and should provide sufficient privacy unless you're ONLY connected to malicious nodes which is quite unlikely.
