Commas and semi-colons. If the rules you learned about commas and semi-colons don’t mean much to you, forget them and try this: Read one of your sentences aloud and see where you would naturally pause, where you would draw a breath. If it’s a short pause, like that just was, you probably need a comma. If it’s a longer pause, but not quite a full stop (for which you’d need a period), you probably need a semi-colon; remember that whatever follows a semi-colon must be able to stand on its own, as a full sentence, like this one.
If you don’t want your reader to pause, there shouldn’t be a comma, there, because as, this demonstrates it’s very difficult to figure, out, what you’re saying when your punctuation, makes the sentence unreadable.
Your sentences shouldn’t leave your reader hyperventilating from the constant shallow breaths that over-punctuation requires. Nor should they be gasping for breath at the end of a long, unpunctuated sentence. (Consider yourself responsible for your readers’ cardiovascular health.)