The first ever electrically powered vehicle designed especially for wheelchair users requiring getting about town without assistance, this could be exactly what you are looking for. You enter the Kenguru on an automatically lowering ramp, which comes down as the back door opens at the press of the key. Wheel in and you'll find a motorcycle type handlebar controls in front of you.
Put the key in the ignition switch and the back door shuts lifting the ramp at the same time. The Kenguru will not start until the wheelchair is in a correct locking position and the door has been fully closed, the security considerations have been fully thought out and implemented with your safety in mind as a priority. What could be simpler?