Yes, you need to do the maneuvers in the correct sequence IF you want to get pattern points. You will not be required to attempt every maneuver in the beginner pattern if you so choose. You must let the judges know which ones you will be attempting if not doing the pattern and you'll get scored only on the ones you fly.

And please remember the start signal. This starts the clock. Your entire flight will be timed from the time you signal the judges (raise your hand and get their acknowledgement) until you land and the model rolls to a stop. You have 8 minutes to get the full pattern in or you'll lose whatever maneuver (and pattern points) not done within the limit. You'll have to set up your model in the circle (it's better to fuel up in the pits), prime/choke so the engine will be ready to start readily. THEN you signal the judges and start the engine. Electric starters are permitted.

It's also OK to have a coach with you in the pilot's circle to read off the order of maneuvers, if you wish.

First maneuver is the takeoff AND level flight. It's a combined maneuver. Takeoff is the first complete lap from your starting point. I'm not sure but I think they score your 2 level laps for level flight immediately after the takeoff lap. You'll do 3 laps for score then fly another 2 laps before going into the wingover.

Above all, relax and enjoy yourself. Contest organizers and judges want to you succeed and enjoy the contest. They'll help you out however they can.