A quick scan of your module and I'm very impressed! Fantastic start for a Perl beginner! Just a couple of minor points I noticed after a quick scan of your code:

sub data_get(+$;$) {
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Unless things have changed recently with the introduction of new Perl signatures, the traditional Perl code style advice has always been an emphatic "Don't use prototypes" -- see, for example, item 122 "Don't use subroutine prototypes" at Perl Best Practices. Googling just now turned up this this article by brian d foy on the newer experimental subroutine signatures (which I have no experience with).

This line of code from your module:

our $VERSION   = '1.0.0';
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is definitely wrong. It should read:

our $VERSION   = '1.00';
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This is one item that PBP unfortunately got wrong as mentioned here. See also Writing Solid CPAN Modules for general advice on writing CPAN modules.

Update: As noted by haukex here: our $VERSION = "1.23"; seems to be the most compatible with the various Perl tools that parse code to find information on modules.

I maintain a long list of general references on code standards and style advice at: Re: I need perl coding standards (Coding Standards References)