CompTIA Security+ being an entry-level exam that is a little difficult or hard to crack, takes a month or two (30-60 days) at max, according to test-takers. And it will vary between individuals, depending on how much free time they have and their abilities in learning quickly. If you have less time but wish to clear this certification, then check out CompTIA Security Plus Training and also watch the following YouTube video on Network Security Basics to get started.