The first bar of this piece is probably the hardest bar in the piece (or one of the hardest). Beethoven liked to put really daunting figures at the beginnings of his sonatas, I think.
Try it with the correct fingering (2-3 on B and D, 1-4 on C E, 2-5 on D and F). If you can't do it with that and a little practice, then your technique is not developed enough to play this sonata. Sorry! But don't worry, you'll be able to play it eventually. But it might be a little while. Remember too, that this is a long and difficult piece and requires a lot of stamina... the first movement is 10 minutes of energy alone.