Hi there! This is a really good question! Every time we want to learn a language we ask ourselves that same question. I strongly recommend to you to use what is called "the lexical approach" - a quick internet search will explain it better than I possibly ever could -
Try to learn phrases of the language.
Hola, cómo estás?
Gracias por todo
Nos vemos luego
And the most important part. Use them like there is no tomorrow! Use these phrases at least 5 times a day.
If you follow this, you'll be surprised how fast you learn
Hope this helps. All the best to you!