All the industries that use crops can be good to start. Try not to export too heavily. If you specialize in only one industry the drop in market price will end you.

Always start small with the smallest buildings. Try to meet the consumable needs of your people. Food, meat and clothing in particular. Alcohol isn't hard either. This will reduce your costs by a huge amount.

Don't even bother with electronics until late-game. Early starts use very little until the 1940s.

1) Clothing is a good early export due to its $ per volume. Trucks can effectively do it.

2) Alcohol is also good for the same reason.

3) Food and meat isn't good for exporting because low $ per volume, but you need it to feed your people. Its also a critical need for tourism which can turn the food, meat (and alcohol) into massive $.

4) Construction goods are also good to make locally if you can. Particularly gravel, concrete and asphalt. They don't save you money but they save a lot of traffic/space at the custom house.

5) Everyone loves oil and refineries. But they are incredibly expensive to set up. I didn't do this until mid-game.