I'm sort of new to Google Analytics and still trying to get a hang of it all. I have a quick question. When I look under Acquisition (All Traffic Channels>Organic Search> Keywords), most of my keywords are "not provided". What could be the issue here?
It is not an issue.
If a user is logged into a Google product (such as Gmail or any Google Account) when searching, their search is conducted over SSL. As such, the referral data relating to that search is hidden that is why you are seeing (not provided). It is same for all, you are not alone.
Please also check this article @ https://www.hallaminternet.com/keyword-not-provided-google-analytics/