Some words have broad fields of meaning. To determine precisely what is meant when such words are used requires looking at context. You have given no context. Presumably, you are trying to translate FROM English to some other language. I doubt that this site can advise on other languages. It certainly cannot when the other language is unknown.
Generally, "take on" is used to mean to start or to attempt a difficult task. One might say "I am taking on a translation of the Book of the Dead into a set of a villanelles" to indicate that a villanelle is a demanding type of poem. Few able-bodied people would say "I am taking on a trip to the corner store."