17M PLS HELP

Little background I have always ate unhealthy oily filth never took care of my body I am obese I am vegetarian so maybe less protein my sleep cycles is not good I am a jee student... ik this was inevitable but can I fix it now pls help

Little background I have always ate unhealthy oily filth never took care of my body I am obese I am vegetarian so maybe less protein my sleep cycles is not good I am a jee student... ik this was inevitable but can I fix it now pls help