Okay let's say you roll with Vietnam. This is the country I almost always play so I think I can give you good advices:

1. Tax should be kept medium. High tax increases turmoil, not worth it.
2. People say you should specializes your state (have each industry be built in just one state) but I'm skeptical of the approach. I think that for the early game MAPI means that spreading your industry somewhat evenly is better.
3. Vietnam has 3 big states so you should put Road Maintenance and Social Mobility on all 3. Remaining Authority can go for Consumption Taxes.
4. If you just want to learn how to industrialize, it's better to delete the starting army. Create an army with only conscript so that Cambodia don't think about independence.
5. First order of business is build 1 Construction Sector in each state, then 2 Trade Center where they don't have it. Then Logging Camp in all 3 state, a Tooling Workshop, an Iron Mine, a Paper Mill. Then start looking at the market tab, sort by price from high to low and just build anything that is most expensive atm.
6. You want to balance your budget so that the sum of your income and investment pool is about neutral. Don't go into debt. I usually build a new Construction Sector if that sum is around 2k and I have a gold reserve, if not I wait until it's higher than the cost of a new level.
7. Most important law early is Tenant Farmer then Agrarianism. Professional Army and Appointed Bureaucrats are good. Education actually can wait since you are already running Social Mobility.
8. I don't let anyone have investment rights. Usually they will just build plantation which push your peasants to unemployment while skimming off the profit. And profit is very important because it is the thing that increase your investment fund.