There are a couple of things you can do.
Waiting until you see the vet will be no problem for your snake. I couple of days with a stuck shed won't hurt it.
Soaking may open up the wound if it is still not completely closed under the skin but if it is closed and healed just the scab will come off. Being a newb, I assume, you probably don't have any past experience like this to base it on.
That's no problem either.
You can get the skin off the rest of the tail and avoid the area near the wound. A wet wash cloth would probably do the trick.
With snakes we don't see the healing process as easily as we do with mammals. A snake can be completely healed but still have a nasty looking scab on the outside which will come of with the next shed. Most of the time.
Sometimes the wound is not totally healed and the scab has just enough grip to stay on the snake.
One or two sheds for the wound to heal, with skin only in the area of the wound, won't hurt your snake either.
Eventually it will either come off in a soak or a shed.
A vet visit certainly won't hurt but I wouldn't be worried about it making it until Weds. were the snake mine.