Questions about example sentences with, and the definition and usage of "Initially"

A: At the start, beginning.

A: Initially means “At first”

A: Initially I had a hard time learning Japanese.
Initially we wanted to go to the park, but we decided to go to a restaurant.
He initially said he didn’t like it, but he changed his mind.
They were losing initially, but in the end they won.
I had to work very hard initially. / Initially I had to work very hard.

A: can you help me with my English?

A: Initially, he thought the new project was nonsense.

I initially wanted to go to dinner instead of the movies.

A: Think of "initially"= "at first"
Example: initially, we thought that the experiment would work.
Most of the time, a sentence with the word "initially" is followed by another sentence that describes something contrasting the information from before.
Example: initially... would work. But it turned out to be a complete failure.

A: initially = at the beginning

early on = towards the beginning but not necessary exactly at the beginning

But it's splitting hairs a little. They are are very similar and could be used with similar meanings.

A: No difference but Initially is more of an educated way of saying first

A: Firstly is not used. Instead use First or initially. They are pretty interchangeable.
The let the person reading/listening know that a series of information is coming.

A: Firstly implies it will be followed up by "secondly" and eventually "finally"

Also, it would have to be "at first" to be equivalent to "initially"

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A: 原本，原先，一开始

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