The initial cause must be immaterialit cannot be constrained by space sans the universe.
Huh? Why? It simply must be not part of this universe.
The cause must be timelessit cannot be constrained by time sans the universe.
Huh? Why? It needs only to be not part of the space time of this universe?
The cause must be powerful in that it brings about creatio ex nihilo.
HUH? Why? There is lots of evidence that causes can be small, not powerful, transient and even destroyed by the very thing created.
The cause must be personal because creative acts are volitional, otherwise the entity would exist contingently.
Ah, so you try to slip in "creative" under some meaning other than causative. The classic example of the carny palm the pea trick.
The Kalam cosmological argument has never been anything more than a carny con.
Anyone so limited that they can only spell a word one way is severely handicapped!