Hi

You don't need to worry even if you are in the first year of your degree you are still eligible for Neet examination provided

you must have passed in English and in both the theory and practical  of PCB i.e Physics, Chemistry and Biology with at least  50  % in aggregate of PCB ( in theory +practical) in 12th examination  if belong to general category , or   at least  40%  in aggregate of PCB if belongs to  Obc/ Sc /st.

if you managed to qualify Neet examination and get a seat in a medical college for your MBBS then yes of course you can leave your degree and join medical college for MBBS

For detailed information about neet examination go through our page for which link is provided below; -

https://medicine.careers360.com/articles/neet/amp

Thank you