Pre-logging help...

Once you have a decent amount of ingredients in your "recent foods" file it's pretty easy. For example, in my Dinner I have logged almost every vegetable I would want to eat recently so I just go in and start adding how many grams I want. I've been weighing food for a while so I have a good idea. Pretty soon I'll have a meal together. Then I'll do the same for dessert, lunch, etc.

All that's involved in pre-logging is knowing what you're going to eat and entering it into MFP as soon as you know you're planning to eat it later. For example, I will often log the items I'm packing in my lunches when I make them in the morning and also dinner, if I know in advance what I am making. It lets me stay within my goal more easily since I know if I do, or don't, have room for anything extra I might want during the day. Since your parents may dictate at least some of your meals it may be a little more difficult for you to do this all of the time but as much as you have under your control, I'd suggest it.

I'm also a college students (who lives with her parents). Typically, I'm the one helping my mother with meal planning and grocery shopping, so I tend to do a very rough log of what the next few dinners will be as soon as we're done grocery shopping. Once I log that, I then log in any anticipated meals and snacks (such as if I know there's a meeting for one of my clubs one afternoon, and there will be free pizza that I'm not going to say no to). After that, I adjust what I am making for the rest of my meals and snacks so that I meet my calorie and macronutrient goals. Once that meal comes, all I need to do is weigh it (if possible) and readjust my portion size into MFP.

Plan what you are going to eat in advance as much as you can.
I log my food for the whole day the night before or in the morning. I usually enter dinner first, then lunch, breakfast and snacks last.