Do they have the same meaning?
* it will help you step-by-step to speak confidently
* it will help you step-by-step speak confidently
are both of them correct?

Question

Answer

Hi, love(Allah).
The verb "to help" can be followed by either a full infinitive (with "to") or by a bare infinitive (without "to"). Yet, you should put "step-by-step", which is an adverb here, at the end of the sentences: It'll help you (to) speak confidently step-by-step.

Answer

No, neither of them is correct.

"Step-by-step, it will help you to speak more confidently."

Answer

They are correct