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Get good at pushing, rolling around on different stuff, turning and carving. this is the foundation of your skating so take time on it. If your pushing is bad it doesn't matter how many tricks you can do you will not look good on a board.
Watch Stereo 'A Visual Sound'. This is what good style on a board looks like.
Try to stay relaxed.
Have fun.
Don't be embarrassed about being a beginner in front of other skaters. No one will give a shot, everyone learnt once and most will probably be very open to sharing tips.
The amazing resource beginners have now is that they can video themselves. So much easier to see where you are going wrong.
Bought my first skateboard, 25 years after last playing on one as a kid - any good resources/tips for a 30-something learner?