Honestly speaking dear the preparation of NEET examination require long hours of your dedication, hard work and proper time management. But it's never too late, it would be definitely difficult to complete the entire syllabus in 6 months, but if you keep your mind focused, concentrated and to proper time management to focus on Physics Chemistry and invest more time on Biology then you can succeed. Don't skip the important chapters of Biology and solve previous years papers,

Hope it helps

Good luck!!