Most expats describe the first few months as a paperwork chain, where each document unlocks the next. The usual sequence looks something like this: register your address with the local authority where required, obtain your residence permit or ID number, then use those to open tax registration, a bank account, and finally utilities and phone contracts. Doing things out of order is the classic source of frustration, since the bank wants the ID number, and the ID office wants proof of address.
A few habits make it smoother. Carry more documents than you think you need, including originals, copies, and passport photos. Ask which documents need certified translation before your appointment, not during it. And book appointments early, because queues at immigration and registration offices can run weeks in busy cities.
Employers with international staff often assign someone to walk newcomers through the chain, and it is worth asking. Otherwise, local expat groups are goldmines for the current, real-world order of operations in your specific city.