I have the same size tank as you. I have the "Odyssea 36" T5 HO Trio Aquarium Light Fixture w/ Built-in Digital Timer + 3 LED 3x39W". You'll find various sources for it if you search around.
If you search around on the forums, you'll find that folks have had varying degrees of success with Odyssea products, but I've had mine a few months and I think it's great. A very convenient feature: there's a programmable panel on the front that lets you program on/off times for 2 of the lights, the 3rd light, and the LED moonlights, all separately. I've found that it gives you lots of options, especially as you're getting started and adjusting your photoperiod. (For example, I currently run a single bulb for a few hours, then no lights for a few hours, then two bulbs the rest of the day, moonlights until my usual bedtime).
I don't run CO2 (yet), but I did buy the fixture with the intent that it would give me the opportunity to do more with it in the future.
And yes, it can be very confusing. I think I spent dozens of hours reading posts on this forum before pulling the trigger on the lights. (Not to mention everything else...!) Keep reading and most of it starts to make sense after a while.