C.M.
Unless he's showing interest, I would wait until he does or is about 2 1/2 as it would be too hard right now with a new baby to potty train him.
While you get past the first few months with a newborn, DO start conversations with him about being a BIG brother and a BIG boy. Tell him that BIG boys use the potty and use daddy or someone else he idolizes as an example. Read him lots of potty books (Once Upon a Potty was my boys' favorite and it clearly explains why baby's wear diapers and big kids don't). Send him into the bathroom with dad or if you are okay with it, allow him to watch you use the potty. Talk to him about how nice it is to not have a yucky diaper, how the potty is cleaner and how fun it is to flush it away. After you change a poopy diaper, take him into the bathroom, dump it into the potty and let him flush and say goodbye to it. Get him interested and prepared and let him know that if he tells you when he thinks he has to go, you will help him use the potty.
Good luck getting him prepared for the potty training...he will be easier to train if he is a little older and is really ready to do it!