Yes, you can switch from Hindi medium to English medium for your Class 12th and NEET preparation. Here are the two options you mentioned, with their pros and cons:

1. Complete Class 12th in Hindi Medium, then take a drop and shift to English Medium for NEET:
   
   Pros:

   • You'll be more comfortable studying Class 12 in Hindi, as you're already familiar with the medium.
     
     
   • You can focus on content during Class 12 without worrying about language barriers.
     
     

2. Cons:

   Recommended
   • After Class 12, you would need to adjust to English for NEET, which may be challenging and take time.
     
     
   • You'll have to take a drop year, which may delay your academic journey by a year.
     
     

3. Join English Medium Coaching with a School like Dumee School:
   
   Pros:

   • You can start preparing for NEET in English from Class 12 itself, reducing the transition period.
     
     
   • Many NEET exams and coaching materials are in English, so this option could give you a head start.
     
     

4. Cons:

   • Initially, adjusting to English might be difficult, but with good coaching support, it’s manageable.
     
     
     Recommendation: If you aim to take NEET seriously, joining an English medium coaching or school now might be a better option. It will prepare you earlier for the exam format and material, which are predominantly in English.