I'm very sorry to hear of your loss. Times like these are fraught with many emotions, including fear and confusion.
Even if we knew exactly what beneficiary means at this point (i.e., what you will receive, etc.), in addition to the guidance Curtis mentioned, I'd recommend simply taking a deep breath so-to-speak. That is, don't feel as if you have to rush into any financial/investment decisions if you do receive funds resulting from your father's estate.
I find a lot of people, when they encounter sudden wealth, wind up making rash decisions they often regret later on (e.g., lavish purchases, real estate "investments", etc). Sometimes simply taking a few months (say, 3-6) helps provide much-needed perspective that will assist in making long-term decisions.
All the Best,