that depends, you have two options to do that
path 1) after class 12th give NEET-UG and get yourself admitted into MBBS or BDS course, then do your MD/MDS or equivalent postgraduation ( many colleges in India allow Postgrads to teach some topics to undergrads but that solely depends on colleges.) by the time you are done with your postgrad you can apply for faculty position in various colleges, if you have done Ph.D it will give you a better chance.
path 2) suppose you cannot make up to for MBBS or BDS you can do BSc ( biology/ biomedical sciences/biotech/ PCB and other biology-related courses) then you can go for M.SC ( clinical anatomy/ clinical physiology/ clinical biochemistry/ forensic sciences etc) and then apply as a faculty, since you are now tagged as "non-medico" you should go for Ph.D. to have greater chances of jobs as a professor.
Note: you can always do Msc ( clinical anatomy etc) after mbbs, bds, bhms, bams and join as a professor.
good luck!
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