so i want the 3.2 volts coming off of my control device to control a 24 volt 0.75 amp actuator. When the control device is high i want the power to be delivered to the actuator and i want no power to be delivered to the device when the control unit is not outputting voltage. I have been cruising the internet to find out the best way to do this and so far the answer i have arrived at is a opto isolator triac circuit.

this is just a generic circuit i found online. I did not make it. I get what u1 does and from what i can tell u2 is there to reduce the current going through u1 but while i kind of understand how it works i cant figure out what components to use for my application. I looked up the MOC3041M and it seems ok but i just get lost the minute i hit digikey and there are 100,000 different ones. For U2 i have literally no idea which one to get...
Is there an easier way to do this?
If not what parts should i use?

 

That's a very commonly known circuit. The triac in U1 is only a momentary conductor, a few milliseconds, used to fire U2.
This output side only works for an AC circuit. You never said your 24 volts was AC. Is it?
If it is, you need a triac rated for comfortably more voltage than 24 VAC and 0.75 amps.
Something like 120 VAC and 3 amps to 5 amps (if this isn't going into a production line machine).
These are so common you might find 10,000 of them that will work.
Oh...wait...you did.

Sort the candidates by price.
U1 is a zero-crossing opto-isolator.
Pick a cheap U2 that fires in quadrants I and III
The only problem you have is being overwhelmed by options because this is so common, so easy, and so cheap to do.