I need help about punctuation.

กระทู้สนทนา
This is what I have found in a novel.

First of all, it was in color, and second, it had the poem that I gave Patrick in it.


At first, I thought that it contains 2 main clauses, which is not correct. But then, I think it has something to do with "and second" which makes the clause "it had the poem..." become subordinate clause. Do I get it wrong?

i think I have so many problems, which are found in the sentences I wrote above. Could you please suggest me some resources to let me drill my skills, especially about punctuation? Thank you in advance.
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