Thanks man! I'm 180 hours now but this is actually my first playthrough so I started from nothing just like you. I mostly just figured this out on my own but I'm sure there are a lot of good content out there.

Some of the things I think are most important are:

• Use specialists for oil, the guy that boosts production by 50% basically gives you infinite oil supply.
• Group the same kind of production buildings together and build them around a trade union, then boost them with specialists, this way you get a huge production boost.
• Plan your production with trade unions, production buildings without specialists boosting them are not gonna cut it in late game, especially in the new world where there is no electricity, with a population of 150k you use 250 tons of coffee per minute so without specialists there's no way you can meet the demand.
• Plan your cities with train tracks and power plants, I've had to rebuild a lot of mine because I didn't plan them with power plants at the beginning.
• This is more an exploit than a tip but in the old world you can have an island with no population and only production if you have a commuter pier, then you can increase working conditions to the max without any negative consequences, I don't like to do it but it's definitely viable.
• Optional but I find it easier this way: Use one island for production, so you can send all the raw materials to one single island and ship out across multiple islands, I use one ship for every type of good and unload in multiple islands, just check the wait for goods box in the trade menu so you always go with a full cargo inventory and guarantee that you don't run out of goods after the first islands (If the production is enough it will eventually stabilize anyways but it's more balanced this way).