Aiyoh congrats on your first trip with bb, don't worry too much! My friend brought her 6-month-old to KL last year and she swore by feeding during takeoff and landing, really helps with the ear pressure, so latch or bottle right when the plane moves, and try to book a flight close to bb's nap time so she hopefully just conk out lah. Someone in my mum WhatsApp group also mentioned changing bb right before boarding and bringing the carrier you already use at home, so bb feels settled and your hands are free. On the solids thing, a few mums I know actually started introducing pouches or Gerber here and there even before the trip, just so bb is not totally blur when she sees it overseas, and most said bb adjusted fine; some had a fussier eater but honestly at 6 months milk is still the main thing, so even if she rejects the ready-made food a meal or two, don't stress. My neighbour also packed those Pigeon steriliser tablets which are super compact and easy for bottles on the go, game changer she said. Overall the short flight to Malaysia is quite manageable, just go in relaxed and ask the cabin crew for help with luggage, no shame one!