That’s great!! 
Ok gotcha.
I think I’d want to break this down into even smaller steps.
- Take a photo of litterally anything with your camera and Picam2 and then save it to disk or throw it on the screen. (could be your cat, a coffee machine, a selfie, whatever).
- Detect whether or not an ArUco marker is somewhere in the frame or not. Yes no questions are usually easier to answer. (e.g. print yes to the console if there is an aruco marker).
- Detect the position of an ArUco marker in the frame.
Try step 1 above
My word! 
BIG project. Do you have a time limit on this? 
Ah ok, so the Pi would detect the presence and then a separate arduino would measure the distance. But, you’re hoping to kill two birds with one stone and just use the PI.
Sure, that’s totally possible and your smart. I bet you could get this working eventually
There is nothing, nothing at all, more exciting than doing something someone told me couldn’t be done.
I also get the purity and focus of a project that does a lot with the fewest number of tools. So satisfying!
Please know that I really resonate with this; I am not here to discourage you.
Ok, with the above having been said, did you professor say that it couldn’t be done, but “meant” that it’s an additional complication that won’t serve your learning journey at this stage?
I’m not saying that is the case, just worth pausing, asking that question, and then moving forward with conviction no matter what you decide.
When I was at Uni I also had professional composers telling me It couldn’t be done. Sometimes, I proved them wrong and grew a lot as a person. Other times, I handed in my unfocused musical composition 3 weeks late and lost 20% on a work that was barely a pass to begin with.
I don’t know which CE video you mean but there content is pretty education friendly so i bet it’s great.
As in live video streaming from a drone??
DANGER!
That is always tough and requires a bit of gear to be reliable. Channel 7 is a 1.3billion dollar company for a reason. 
I’m not saying it’s beyond you, but I would leave this for LAST and treat it as a stretch goal. Just my two cents.
This could be a long project @Caroline269834
Pix 
so that’s why I wanted to give it a shot.
I will definitely divide the ArUco detection into smaller bits and work my way up!
I even recorded a 5sec video of me moving the marker around and it also detected it! Its so exciting!
now my raspberry isn’t loading properly. The red light turns on when I power it but when I turn it on, the green light powers up yet it slowly fades away. I’ve tried using different cables, I’ve tried using different microSD cards (since it loads up when I don’t have the SD card in) but I don’t know what else to do. The loading screen flickers and theres lines across the screen also but it never fully loads up.
