The Spanish CH is easy to master for English speakers — it's basically the same as the "ch" in English words such as "church" and "march."
Unlike in English, the Spanish ch is always pronounced in the same way. Spanish cognates of English words where the "ch" has a different pronunciation are typically not spelled with a ch in Spanish. For example, the Spanish equivalent of "architect" is arquitecto.
Some older reference books may indicate that the CH in Spanish is considered to be a separate letter of the alphabet. However, that is no longer true.
Words and phrases in our audio lesson on pronouncing ch are muchas gracias, charlar, china and chino.