in my opinion reading books, or even just dome short writing in Spanish can go a long way. Every time you come across a word you dont know look it up, or ask and write it down. Even try writing a sentence along with the definition of the word.
Necesito la medicina. Voy a ir a farmacia hoy.
Yes escribir is a reflective verb.A reflexive pronoun (pronombre reflexivo ) is used as part of a reflexive verb (verbo reflexivo ) to indicate that someone or something is performing an action on or for itself.