Joseph
Sure remove all the tumah from your home including the unnecessary technology (fancy cell phones, ipads etc…)
Remove the tumah from your mind and raise your children in pure spiritual purity like they do. Anything which EVEN MIGHT cause their child to turn away C”V is not allowed in the house even for the parents. Can you handle this? For the sake of your children yiddishkeit? If you can and do raise them this way they definitely will be ready to marry by 18 or 20 the latest.