Indian Train Chikan I'm Taking An 19 Hour Indian Train Ride (AC 2-Tier Sleeper). What Can I Expect?

I'm taking an 19 hour Indian train ride (AC 2-Tier sleeper). What can I expect? - indian train chikan

I have to go before, from Mumbai to Jodhpur and the train in AC 2 defendants (19 hours !!!). Can you describe what my experience might look like? Is there privacy? More importantly, can freely through the train? Thank you!