Also consider a low-cost 250watt wheel based throttle-based
Hilltopper conversion kit that I installed on my commuter, and that I've put 1,000 problem free miles on in the last year, with lots of short hills. The throttle is great for getting you up the hill, and then you can easily release the throttle and go on your own power when you don't need the help any more.
And the only skillset you need is knowing how to swap your front wheel (the wheel you buy comes fully assembled and with a tire and tube on it), mounting the throttle onto the bars somewhere, and tie-wrapping some wires. The battery just mounts where a water bottle holder would.