First I would suggest adjusting your lifestyle to a meditators lifestyle. This will give you a taste (small taste) of what it would mean to become a monk.
A meditators lifestyle would basically mean following the 8 precepts, restricting sleep, and meditating a lot. I say minimum of 4 hours a day but no limit and how much you can go up to. Also,sense restraint and general mindfulness in the day.
Also, contemplate on what it really means on a practical level. You could possibly, likely really, never see your friends again, certain family members and all the simple things you like you won't have. Family will only see you if they go out and visit you or fly you to them. That movie you like? Won't see it again. I know a number of people who feel the same way you do but who couldn't give up all these things and people. So, consider it.
Also consider why you want to ordain. What is the real, true and deep motive. It seems to me that people that don't truly have the desire to do it won't last. So think about the positives of monastic life and reasons to do it etc..
As you follow more precepts and train more, you will have up days and down days. It is your continuity and determination that will get you through it. And patience. Patience, patience, patience.
I'm not discouraging you, in fact I am encouraging you to go forth. I think it is a good decision for someone if they are ready. I'm just telling you what I have done to prepare mentally and physically--with positive results--so that you can properly prepare yourself as well.