Number 1
Actually wanting to learn the langauge.
You’re no gonna learn it if you unintrested.
Number 2
Study as much as you can.
Number 3
Surround yourself with people who speak the langauge then you will have reason to use it.
I know this list seems sterotypical but it’s kinda true one of the biggest langauge barriers is ourselfs if you apply yourself you can do anything...