Yes, no and yes. It really is that simple, yes, just remove the fuses, wait a bit, then re-insert them and the ECU will have been reset. Don't think there are any risks if you just do that, the only thing I can think of is that if your engine check light is on and there are some codes to be read associated with that, then you'll lose them if the ECU is reset. If your light is not on then there will be nothing to be read.
Yes it should help the ECU re-learn if you change the type of fuel.