What's the best approach to learn spanish words? what would you recommend?

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.

me gusta (escribir) en mi cuaderno.

this means : i like to write in my notebook

hopefully this will you out