When starting with working out it is best to start slowly
>Build a weekly schedule (2-4 sessions/week) and stick to it.
>Include running, some weight lifting (Pull ups/squats, push ups are enough if you lack equipment) in different sessions.
>Rest days are as important as training days
>always stretch before your workout, do proper warm up.
>Diet: You cannot outrun the fork. When starting just remember to eat enough, include protein and carbohydrates. Especially post-workout meal is essential.