[PeterRed]

Originally Posted by Rusty

The preposition that conveys 'starting from' is also used to mean 'since a certain time'. That same meaning can extend to 'a place', in Spanish. What preposition did you select for the first thing I marked?
You can use the same preposition later, in front of 'allí'. 'Comenzando allí' also works.

Well I was thinking at the first thing you marked to replace 'de' by 'desde'.

Then the corrected letter should be something like this:

"Querido Ricardo,

Soy Peter y tengo 18 años. Soy estudiante de español. Vivo en Amsterdam, la capital de Holanda. En Amsterdam hay muchas actividades divertidas. Para ir a mi escuela desde mi casa tienes que tomar el autobús 231 y bajar en la parada del ayuntamiento. Comenzado allí tienes que caminar 200 metros al norte.

Cordiales saludos,
Peter"

Is the use of 'desde' correct here? And if so is the letter now correct, or are there any improvements I can make?

Thanks in advance,
Peter