I don't mean anything by this but you can truncate amazon and ebay links. For ebay delete everything after the number before question mark, or copy up to the question mark to begin with. For example:
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The same for amazon. If you use the share option on the site you get a tidy link or there is a slash after the ID.
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And google doc links look shady, you have to sign in with a google account which is a relatively common phishing method.
So, if I am reading correctly, you have a china doll, and a shift kit, but your drivetrain needs either repaired or replaced.
You need to decide if you want to run it single speed or to want to work on the drive train. If you go single speed you need to retain the ability to ride your bicycle, like a bicycle. You have to actively put effort into pushing the pedals when you go up hills or at low speeds.
Generally, derailleurs are dead simple, it just shoves the chain over. The same for the shifters, its just a ratchet. The problem gets to being whether or not your components are compatible and the state of the components. If the ratchet is worn, the shifter wont index correctly, if you have a straight cut cogset it wont play nice because indexed shifting is relying on a profile of the cogs, that allow the chain to be on two cogs at once. If everything is bent 3 times over and caked in rust and mud, it wont play nice.
Some pictures would go a long way. You can cut down the pedals if you just add in an electric motor that drives the jackshaft. A 100-200 watt brushed scooter motor can be bought dirt cheap and will turn around 2000 rpm. You will have to raise the rear wheel to start it, but it will start. If you want to go without a crankset, and single speed you will need a phantom 85 or a predator 212 and to gear relatively low. Top speed at 35mph. You need torque to get started, no way around it.
www.bikeberry.com
