It is normal that some doubts appear when moving to a different country. Some of them are related to biking.
It is logical that different countries follow alternative justices over using a bicycle daily, so the first tip is to take into account the local laws regarding it. Receiving a fine for not knowing the local law when pedaling is discouraged.
Next, choosing your future bike (if you did not bring it with you) is essential and for that take a look at the bicycles that local bikers drive. For instance, if the city/country is hilly, ebikes and mountain bikes use to be preferred. If in a flat city, a city bike is usually acceptable. Buying a first hand or thrift bicycle depends on your economic situation. However, never buy a bike without bill as it could be robbed and thus you would contribute to bicycle thefts.
Another tip is to look at local bikers: how they ride, where they go, what garment they wear regarding local climate. This allows you to anticipate the best behavior while riding.
Finally, if you want to meet bikers and make friends, one of the best ways is to participate in the Critical Mass.