Its a small area on a hill surrounded by a road or the limit of the woods. Covered in trails every which way, so if you get lost you will not be lost for long. Either ride uphill or down hill, how hard can it be.
Pick a bit of it and ride all the trails in it, soon it will make sence. Plus getting lost for a while means you will ride stuff you have not done before.
After a few vists you will get some idea of the place, after several visits you will realise there are endless trails. I must have been ten times and still find loads to ride Id not done before.
Take a couple of quid as you may ride into the warden who will want you to buy a day pass.