So, today I woke up at 8:00 and went tohad breakfast.

For breakfast iI had a sandwich, a boiled egg, and capea cup of teea.

After i surf inwards, I surfed the web.

Now iRight now, I live in Germany and therefore I have not gone anywhere because there are strikes in Germany.

I talked to my boyfriend on the phone, he currently lives niw in Slovakia. I studied English because I want to move to America.On this in principle everything, can no longer Other than that, I don't remember what ielse I did today).

Sorry, I couldn't understand what you were trying to say with "On this in principle everything" and I'm not sure where the half of the parenthesis came from.

For breakfast i, I had a sandwich, a boiled egg, and capea cup of teea.

After iwards, I surf inthe web.

Now iI live in Germany and, therefore, I have not gone anywhere because there are strikes in Germanyhere.

I talked to my boyfriend on the phone, he now lives niw in Slovakia. I studied English because I want to move to America. On this in principle everything,note, I can no longer remember what iI did today).

So, today I woke up at 8:00 and went to breakfast.

If you want, you can add an 'am' after '8:00'.

For breakfast i, I had a sandwich, a boiled egg and capea cup of teea.

After iwards, I surf inthe web.

Alternatives for 'afterwards': then, later, after that

NRight now iI live in Germany , and therefore I have not gone anywhere because there are strikes in Germanytaking place here.

Alternatives for 'right now': At the moment, currently
Instead of just 'gone anywhere': travelled anywhere, been able to go anywhere
Another way of phrasing: I live in Germany at the moment, and have not travelled anywhere since there are strikes taking place here.

Thus, I sat at home.

If you want to make this and the previous sentence flow, you may want to add a connective word; for example, 'thus', 'therefore', et cetera.
Alternatives to "sat at home": stayed at home, stayed indoors.

I talked to my boyfriend on the phone, hewho now lives niw in Slovakia. I studied English because I want to move to America. On this in principle everything,note, I can no longer remember what ielse I did today).

You're either missing a starting bracket or accidentally putting a bracket to end the last sentence instead of a full stop.
It would make more sense to say that you no longer remember what else you did today, not just what you did, since it contradicts the rest of your writing.

For breakfast iI had a sandwich, a boiled egg and capea cup of teea.

After iwards, I surf inthe web.

Now iI live in Germany and thereforeright, and so I have not gone anywhere because there are strikes in Germany.

So I sat at home.

I talked to my boyfriend on the phone, he lives niow in Slovakia. I studied English because I want to move to America. On this in principle everything, can no longer remember what i did today)

I'm not sure what your last sentence here is trying to say. 😅