Car starts then immediately shuts off

Hi Sunny.
first check the fault codes for proper diagnosis,if u don't have scanner, you can make fast trouble shooting.
-first check battery condition.
-when you turn the ignition key engine does not turn and u don't hear any clicking noise from starter,problem can be from starter solenoid or its cable,ground,ignition switch,when you hear clicking and engine does not turn problem can be from the starter internal contact,or the wires and ground also.
-remove the spark plugs try to turn the engine by handle with its socket from crank pulley over miss fire can flood the cylinder with fuel that stops the engine from turning.
-then miss fire problem must be solved detecting by scanner which cylinder miss firing,checking ignition coils,injectors,engine compression.
here are our guides:
https://www.2carpros.com/articles/car-cranks-but-wont-start.
https://www.2carpros.com/articles/engine-misfires-or-runs-rough
https://www.2carpros.com/articles/starter-not-working-repair
https://www.2carpros.com/articles/how-to-test-engine-compression.
lets us know what happens with u,its better to send a video about the problem,and check for fault codes.

Please send video of the problem and fault codes if you can to know the problem is from the starter or the engine crank blocked.