OK need help on what to do

Cassie • 🎉🎃🍁🍂 blessed with a beautiful 3 year old boy a 2 year girl and a 9 week girl👨‍👩‍👧‍👦
So I have a 1 year old and I also have a 5 month daughter, my 1 year old has only recently started walking unaided since the start of this month, I thought today I would try and take him out on the reins while my daughter is in the pram, but I'm nervous to and think that I'll just take the double instead, do you think I should take him out on the reins and see if he will walk or just put him in the double, I'm only walking 2 streets away to his grandparents xx