is this a good presentation of tawheed proofs?

since any necassery existance or God is absolute and one,he is absolutely one. a composite one would be a generic and abstract 'one',and abstractions do not have concrete and actual existance,so any actual being must be absolutely one. and that multiplicity in any essence must be by nature contigent(if someone knows why then add it and do give your wisdom)and a accidental property. and 'necasseriness'and 'being'are by definition ontologically absolutely one(if anyone can answer why that would help me). IDK,I made up this argument after making dua that sayyiduna muhammed said would always be answered for farasa in knowing absolute yaqeen of tawheed(I come from a trinitarian backround). any help or corrections are welcome.