Spellwork seems to involve two main ingredients; objects and incantations. The objects range from symbolic items like keys, mirrors, athames (a ceremonial knife or dagger), lockets or pendents, to active items like cauldrons (for mixing potions), herbs, candles, smudging tools (bundles of dried herbs lit to smolder), crystals, and wands. The incantations can be poetic, or straightforward, or in an impressive sounding language like Latin.
Those two open pages are your chance to be creative! Think of two basic spells, one per page. Maybe a love spell for one, and a curse for the other. Think of the sort of objects you would use for each spell (say a locket and some lavender for the love spell, and the eye of a frog and the toe-nail of a bat for the curse). Then, write the spell out like a recipe; an ingredients list, followed by directions for how to do the spell (rhyming if you've got a lyric wit, or straight forward if you don't). Throw in an incantation in Latin, and directions for which way to wave a wand. Use a red or black sharpie, and maybe write with your non-dominant hand so it looks like it was done by a semi-literate old forest witch. Splatter it with some drops of food coloring, so it looks well used like any good recipe.