I hope your publicly visible email has nothing to do with your real identity - and I suggest you make it invisible to the public in your profile.

And if you want to break the link between the BTC you have now and the ones you will send as a donation, CM is a very good solution (and very simple) in my opinion. If you use TOR and CM, I believe that your privacy will be protected to the extent that your authorities will not be able to link your donation to your identity.

I'm not sure if there is a tutorial for CM in English, but you can use Google Translate for this one written in German.

Chipmixer Guide