Problem with ignition(?) turn signal/tank indicator/hupe

Moin together, with my Derb Boulevard 50 2t there are some problems. If I turn on the ignition happens garnix. So I can start the engine then (via kickstarter) but that’s it. The tank indicator should then actually show from empty to full and back or not? The pointer moves however no piece. In addition, however, the tank indicator does not work anyway. Think of the tanker is gone. The horn does not work at all. Likewise the turn signals. Neither the pears, nor the blinker indicator in the speedometer. The e-starter doesn’t make much. All this makes me suspect that it is not a problem of the individual components, but a fundamental problem with the ignition or electronics. The light is strangely. Could it be a mass problem? Or what else? I know myself half well with mechanics, but with electrics I am out. So don’t take it with me, if my question is stupid?? Are I happy about any ideas and solutions Proposals.