I recently just bought a Honda hobbit as my first bike. I purchased this as non-operational and was scared. The only experience I had prior to this was an autoshop class i took 15 years ago and we disassembled and reassembled a carb. But of course I barely remember that.
That being said, I have experience with bicycles (not even of the geared kind-- but I can disassemble and reassemble as long as I have the tools including non-sealed bottom bracket and headset) and I was able to get my moped running.
Really a moped only needs three things to run: compression, spark, and fuel. Yours already runs so you can rule out compression and spark. So you just have a fuel issue
Just watch a video about how carbs work and learn the terminology.
Usually its just a carb issue and once thats clean.. you should be good to go. Its basically take it off, unscrew stuff, spray stuff and put it all back together. Run wire through holes as well.
That's all I had to do (maybe I was lucky) so you shouldn't be worried. Once you open up the carb and put it back together and you reread all this, it'll all make sense.