Interviews preparation

Hi folks I'm a FULL Stack SDE with 6 yoe (java spring , angular Kafka microservices stacks). I want to know what all should I prepare for in order to get into the big tech companies like MAANG , Salesforce , etc. I'm currently working with CITI for the past 2 years. Please help me with the preparation strategy in terms of what all should I start preparing and how to grab opportunities(don't have referrals , would rely on LinkedIn so far). I'm planning to start giving interviews by March 2025. TIA.