Data Science has more scope than digital marketing. Data science has a very good demand and in future it will create more demand for data scientist. Digital marketing is also a great course it also has good scope. Since digitalization took place and getting more towards it digital marketing and data science both has good market and scope.
There are many job oriented course it is totally depend on the sector or field you have interest. If you could tell me I will help you.
It is better to search a job in mechanical field rather than doing any job, implement your education and skill in the same field you have studied. Many jobs in govt are also there for mechanical students. If you want you can try for any competitive examination.