I looked after both of mine, 4 months apart, a grandson and granddaughter, from almost birth, they are now both 5, it us hard, adding into the mix my 3 chihuahuas, and my full time shift based job! However, they are such good friends now, there's also another little grandson age 2, but because of c19 pandemic, o barely know him! Its such a privilege to be able to get so close to the grandchildren! But I had to let things go a bit at home and there were times it felt like chaos, but I also had my own children close together, 3 under 3, age 21, so this feels like a 2nd turn, id so go for it with an open mind, and just relish it! And if you have dogs? Get a room divider!