Brother travel very safely. It is very risky travelling in trains now. It is very difficult to follow all safety measures all 19 to 24 hrs journey time. A person cannot wear face mask all 24 hrs i think, while sleeping at night wearing face mask i think is not possible. When u will sleep at night in trains that time very risky because you don't know who other passengers will cough, sneeze at night...... a little lapse will get u Corona affected. Remember 80% of asymptomatic patients are there in India whom you cannot see whether they are affected or not.
Be safe....travel safely.