There you go.
I understand you didn't want to risk burning out the LED.
These are lessons learned and next time you'll have a better understanding.
If you were to meter for voltage now at the resistor, with a lead on one side of resistor and the other lead on the other side, you should see around 3 volts there so that means the drop across the LED will be around 1.8 or so.
Looks good
To answer the other question, higher numbers mean higher resistance.
The higher the ohm number of the resistor, the larger the voltage drop across the resistor and the lower the voltage drop across the LED.
So with a 330 ohm resistor before the LED, the dimmer the LED as compared to the 160 ohm.
If you were to put something like a 100 ohm or smaller number resistor, then you would run the risk of blowing the LED.