adjective / noun / verb
initial
ih-NISH-ul/ɪˈnɪʃl/
At the opening position in a sequence.
The initial domino tips into the second while the rest remain upright.

Etymology
Latin initium meant both an entrance or going in and a beginning. That connection pictures the beginning as entry into something, making initial describe what occurs at that opening stage.
In context
the initial days will maybe be a little awkward just sort of getting past that initial hi I'm Kyla
More examples
- My initial reaction was surprise, but then I understood.
- She writes her initials on the notebook's cover.
- Please initial each page before signing the last one.
Forms
initial · initials · initialed · initialing
initially adverb — At the beginning of a process.