Sure thing… there are three primary things to do: you can play tent modes, go for Corkscrew Multiball, or go for Beer Barrel Multiball.
Tent modes: start these at the lit scoop (center playfield); if scoop is not lit, complete the T-E-N-T letters on the inlane/outlanes or by shooting the unlit scoop. Lots of different tent modes, many focusing on different elements of the playfield. Juggling is a multiball. Tap It is a video mode similar to Tapper. Try 'em all and see what you like and where you feel you can earn the most points.
Corkscrew Multiball: complete either OKTOBER (targets on left side of playfield) or FEST (targets on right side of playfield) to light 1 lock on the left ramp. Complete both OKTOBER and FEST to light all 3 locks on that ramp. Lock 3 balls to start Corkscrew Multiball. Shoot the roving jackpots (red arrows). Complete OKTOBER or FEST to light a Super Jackpot on the left ramp. (If you didn’t collect at least one Super Jackpot when you drain down to 1 ball, you’ll get a brief shot at a last chance Super on the ramp.)
Beer Barrel Multiball: complete PROST (targets center playfield) to light locks on the Beer Barrel ramp (upper flipper shot). Personally I find this easier with the help of the MagNab button to catch the ball there to set up the shot. The third ball locked in the Beer Barrel starts Beer Barrel Multiball. (These balls can be stolen, so if another player has locked 2 balls there already, you can start the multiball by just locking one more.) Shoot flashing shots (red arrows) for jackpots. Shooting the Beer Barrel ramp relocks the ball for a timed period, during which all jackpots are increasingly valuable. Locking another ball collects a Super Jackpot and lets you keep shooting multiplied jackpots.
There’s a lot of deep strategy around collecting different steins to make things in the game easier or more valuable, but based on what you describe… don’t worry about those for now. If you get into the bar, just accept whatever stein the game suggests; it’ll do something good. Later on, if you want to dive into strategy, the steins will be waiting for you to explore. And there are lots of other fun little features in the game to be discovered, but again, no need to overwhelm yourself with those for now.
Play the primary features of the game, shoot the flashing shots, have a great time! Hope you love Oktoberfest.