Awaiting My First India Train Experience

We got into Delhi at 5:30 am yesterday. Originally we just wanted to find a place to sleep for a couple of hours, till check out at noon...either people didn't get it, or they were being a little money grubbing because we still would have to pay 300+ rs for 4 hours. After not sleeping at all on a bumpy, nauseous ride with other passengers way too close for comfort with horrible gas and breath, and hacking up a lung, we decided to stay in Majnu ka Tilla again for the night.

Yesterday, we got our train tickets for the next 4 trips we will be doing.
Paying for the sleeper class, one of the cheapest options, I find myself a little anxious for what this, or these, nights will hold. I have heard that people in the sitting class will try to get into your berth with you all night, making you fight and push them off. We'll see what happens. All I know is if it is a horrible and uncomfortable ride, I will definitely pay the extra rupees to make sure I have my own bed. I guess we'll cross that road if need be. But a 12 hour train ride of pushing away creepy Indian men sounds like no fun at all...
I will be sure to keep you updated on this event.

Our train leaves tonight at 8:45pm from the Old Delhi train station and we arrive in Jodhpur, Rajastan at 8:00am. We will spend one night in this 'blue city' and then we are going to Jaisalmer for 3 nights to watch the sunset over the rolling dessert, and maybe go on a camel safari depending on prices.
From there we have a ticket to go back to Jodhpur in order to catch another train that day to Agra, the place of the famous Taj Mahal.

I am stoked to leave Delhi, as I am also interested, and a little nervous, for this ride...