Break the cycle of endless grammar drills. You know the rules of Present Perfect, but you still freeze when a native speaker says "Hi." 

Fluency is a muscle, not a memory test. Stop confusing 'studying' with 'doing' and start:

• Thinking in English without translating
• Building muscle memory for real-time speech
• Overcoming the "fear" of making mistakes

You don't need another grammar course. You need to talk to a real native speaker. No judgment. No grades. Just actual conversation. This is exactly what Cambly offers.