it’s a big place, Yorkshire.
and it gets very very crowded* as you get near to Leeds. You’ll need to get there early if you want to see le Grand Depart itself.
Holme Moss is to the southwest of Leeds by a fair distance. might even be on the wrong side of Huddersfield.
sadly I haven’t a clue about the route so can’t help any more at this stage (no pun intended)
*2+ million people live in West Yorkshire. Leeds & Bradford districts make up about half of that. Don’t plan on going anywhere fast within the Leeds/Bradford area, especially in rush hour