You should browse the "Newbie" section of this forum, because this question has been asked numerous times before and most of the answers to these types of questions are posted there. https://bitcointalk.org/index.php?board=39.0

https://bitcointalk.org/index.php?topic=3239038.0

https://bitcointalk.org/index.php?topic=3370560.0

The safest option for most newbies are to buy bitcoins from one of the most well known and regulated exchanges and then to transfer those bitcoins to more advanced cold storage options. Do your research on paper wallets first.