Masyaallah, you're doing so well handling twins solo, that's genuinely exhausting and you should be proud of yourself, dear. Since your babies were prem, I think it's really worth bringing up the solid food question directly with your paed at the end of the month, just to get that peace of mind specifically for prem babies, because corrected age does matter and your doctor would know best for your twins' situation. The readiness signs you described, meniarap, grabbing when placed in hand, bubbling, are really encouraging, but I would feel more comfortable if a doctor confirmed the timing for you given their early arrival. Hang in there, you're not alone!