you will never achieve "full anonymity" when using bitcoin because it is not designed that way. everything you do is increasing your privacy to the point that you can be almost certain that you are anonymous. if you want full anonymity then you must use physical cash with some additional steps!!

to hide your IP address. technically a third party can figure out which transactions belong to you when you create and broadcast a transaction even though there are methods to make it harder. so using TOR would hide your IP and makes it even more difficult to figure out who you are even if they could find which transaction came from you.
running your own full node compared to using another node through your Electrum client also removes the fact that you have to send all your addresses to that node and it can link them all together.


I am sorry. I still try to get my head around your explanation and please bear with me. If I don't use full node or EPS, my node will have to broadcast the transactions, so if i use my IP address (without VPN or TOR), my transactions will be leaked to ISP, right?

Lets assume, i use VPN / TOR and full node, the transactions will be broadcast using TOR address, but then how is it any different from not using full node and just use TOR and let a third party broadcast the transactions?. The third pary who broadcast the transactions won't be able to link my transactions to me because I am using VPN and TOR, and the IP address received on third party is coming from TOR.


keys must be generated offline on an air-gap computer and never online. if it is online then you have more things to worry about than your privacy.