D.D.
I potty-trained all my sons and Child Care children without the use of an actually potty chair. I had not problems with using the regular toilet. If there was an aiming issue with boys facing fowards, I would just face them backwards (towards the tank, legs over the seat) and it helps get the pee into the toilet! Keep books, stickers, potty-area-only toys nearby to help with the appeal of sitting there.
He may be too young to actually potty train, but every child is different, and there are boys that will potty-train that early. My oldest son was interested, but it took a long time to be fully potty-trained from when he first displayed interest (a year).