You know Heaven, you can do a check on your own cervix if you think you can manage to get in to some sort of position to attempt it. Make sure your fingers are clean to start. Gently insert a finger, and feel towards the back of the vagina. Baby's head should be easy to feel - hard, smooth, and round. And then you might be able to find your cervix. (Sometimes it stays well back until labour starts, but sometimes it moves forward a little earlier.) The cervix will be like a squishy donut shaped lump. It may be a "tall" lump, or flatter, and it may have a dip in the middle. The dip is where you may be dilating. If you can fit a fingertip in, that's about 1cm dilated. Two fingertips is 2cm, roughly. You can also see how it feels - firm, or soft. I think firm is something like your nose, whereas soft is more like relaxed lips. (feel free to correct and clarify anyone. ) The cervix will become soft as it prepares for letting that baby out. It will also get flatter as it begins to efface.
Don't expect to be able to tell for sure what is going on, especially after your first check. If you are curious about what your body might be doing, you can do a number checks over a couple of days, and observe any changes. And, even if you feel like you can't make heads or tails out of what might be happening in there, any stimulation of the cervix releases oxytocin, which helps to trigger contractions.

All the best for getting that little bean out soon! Hope your labour goes beautifully.