Immersion is the key. That's how you learned your first language.
Sounds like you have a good grounding in grammar and vocabulary. That's your toolbox. Now you need to learn how the tools are used. If you have a Spanish speaking community available to you, spend as much time as possible there. Same with TV, radio and newspapers. Forget English. Stop trying to translate and you will start thinking in Spanish. That's how children do it. Listen and repeat.
Kick in to the DU tip jar?
This week we're running a special pop-up mini fund drive. From Monday through Friday we're going ad-free for all registered members, and we're asking you to kick in to the DU tip jar to support the site and keep us financially healthy.
As a bonus, making a contribution will allow you to leave kudos for another DU member, and at the end of the week we'll recognize the DUers who you think make this community great.