yes! I would get a dog between 6-12 months so it’s past the teething and other terrible stuff :) I would also get a male since your older dog is female.
Go to the shelter and start looking. You can always bring them back if it doesn’t work out but I highly recommend you give it a solid 30 days for them to adjust which I’m certain they will. Especially if they know YOU are the alpha.
God bless you as you go through this; it is always terrible to lose our furbabies.
I’ll take that under advisement.