You underestimate yourself. That's a fancy spoon. So you are a fancy carver.
. Tang oil is used for chopping boards so is good for spoons that will be used with edibles. It soaks into the wood very well and will last longer than bees wax. The wood will keep it's surface texture too, where bees wax adds a sheen. I suppose it's up to individual preference.
Another thing to think about is; your spoon has curves and lines that are the basic shapes of most carvings. You have created them with very good ratios. You should take a step into something more intricate. Nothing to lose. If it turns out badly, it's just a lesson learned for your next attempt.
I'm only starting off myself so I shouldn't be preaching but it's how I see it at the moment.