Potty training before new baby arrives?

Angela • Baby Boy Born July 20th 2016💙 Baby Girl Born August 24th 2018 🎀 Baby Girl #2 Born January 2022 🎀 🌈 Baby Boy #2 born May 17th 2024 💙

So I’ve been trying to somewhat plan ahead because I can only imagine how hard it would/will be to have two in diapers. My son is currently 18 months and we’ve slowly introduced him to a toddler potty. But I’m going to be honest he’s a bit slow and I know it’s going to take awhile. The next baby is due in August and I’m wondering if he would be easier to get him potty trained this year or wait until he’s older even though that might be when we have a newborn?

EDIT:

We are by no means forcing him into potty training. If he picks it up great and if not no biggie. If can’t hurt to slowly introduce him to it.