LPT Request: Guys, I'm moving to the US. What are some basic tips to not be fooled by everything and everyone?

I'm going to Florida, if this helps. some areas of interest:

• internet/mobile: providers, VPN?, carrier, etc.
• money: banks, taxes, retirement , 401k, investments, credit cards, etc.
• supermarket: brands, good and bad food, etc
• insurance: health, house, etc.
• house: renting, furniture, security, etc.
• other subreddits that can help me