If you grew up hearing and speaking Spanish at home, you are not starting from zero. The best course builds on what you already carry in your head and targets the gaps that beginner courses never seem to touch.
A heritage speaker is someone who grew up with Spanish in the home, usually hearing family members speak it from childhood. You may understand far more than you can comfortably express, switch to English almost automatically, and feel confident socially while less sure in a business email or a formal essay. That profile is a real strength, and it means the standard beginner course is rarely the right fit.
Your ear is your superpower. You already recognize natural rhythm, accent, and everyday vocabulary that a brand new learner would spend months chasing. You do not need to be taught to understand Spanish; you need tools that respect and extend what is already there. Look for courses aimed at heritage or advanced learners rather than ones that start by naming colors and days of the week, which will feel painfully slow.
Most heritage speakers hit the same few walls: formal grammar like subjunctive and tense consistency, reading longer and academic texts, writing in a polished register, and knowing when casual speech is appropriate. A course is useful to you when it names these gaps directly and drills them with practice and feedback, not when it assumes you have to rebuild the language from scratch.
Because Spanish already sounds natural to you, audio is where you will progress fastest. Podcasts, radio-style lessons, and spoken media in Spanish let you stretch comprehension with real native content at a comfortable pace. They are lighter lift and often free, making them an easy daily habit. Add them to any structured course you choose to keep your ear sharp between focused sessions.
Listening alone will not fix formal writing or tricky grammar. That requires deliberate, structured work. Pick a course with explicit grammar explanations, written exercises, and ideally feedback from a tutor or teacher. Heritage speaker courses and advanced level classes fill these exact gaps far better than an app that mostly tests vocabulary you already know.