Guide to Make the OR Gate
Firstly, you don’t need capacitors to make the OR gate.
Transistors only allow flow in one direction and don’t backfeed to the on/off signal, so as long as they are both connected to the same output they will work. You’ll just need a separate NPN transistor for each input so that they don’t backfeed.
Input becomes your on’off trigger, and +V becomes the actual signal
Remember that an NPN transistor only allows current to flow across blue if red is receiving a signal, otherwise it’s off.
If you’re still stuck, hover below for an example solution: