You should be putting punctuation inside the quote when it ends a sentence.
Single quotes, not double quotes, should be used in your comment since you are not completely and directly quoting your source.
You should not be capitalising the first letter of a quote when it occurs after the beginning of a sentence.
These are just some of the grammatical errors you've made in two paragraphs. I've probably made some too. It's pointless to discuss these things outside academic contexts as long as the text can still be understood.
Single quotes, not double quotes, should be used in your comment since you are not completely and directly quoting your source.
You should not be capitalising the first letter of a quote when it occurs after the beginning of a sentence.
These are just some of the grammatical errors you've made in two paragraphs. I've probably made some too. It's pointless to discuss these things outside academic contexts as long as the text can still be understood.