Girls, I'm breaking my head and need to fly urgently! I'm taking my so…

Girls, I'm breaking my head and need to fly urgently! I'm taking my son to Moldova in April, he will be 4 months old, and my middle child will be 2.8 years old. I'm flying back with mom, and alone with the kids from Shymkent to Moscow - Moldova, back to Moldova - Moscow - Moscow. From Shymkent to Sheherezade Airport, a bag, stroller, lightweight folding, wipes, formula, diapers, that's all! Maybe someone has experience flying with children, I can handle it, I won't handle it, share your experience flying, I need to make documents! Thanks in advance.