Such is a word with plenty of different functions in a sentence.
Such can be simply translated as "like". Instead of saying "I love things like reading books and watching movies.", you should use "I love things such as reading books and watching movies.". In these type of situations such is always followed by as.
In other cases, such is used as "very" and is always followed by an indefinite article. Example: "This is such a good book."
The only case when an article is not needed is when the described noun is uncountable (money, coffee, water). Example: "I have never tried such good coffee."
Such can also have an idiomatic use. It can mean "a certain type or kind of"
-I had never heard such music before. (I had never heard this type of music before.)
This word has a complex use, thus I hope this helped you a little bit.