K.F.
At 9 months my son would pick up bites of food and eat - anything we put in front of him. Then he just stopped. He didn't want to feed himself big boy food, he only would eat the baby food. This continued until he was 14 months, and then he started eating on his own again, and now at 2 he eats with a spoon and fork easily.
Don't stress it. Just keep putting little bites down in front of him so they are there if he wants. Feed the baby food. With my son I would sometimes take the little bites off his tray and make a big deal of eating them myself - monkey see, monkey do mentality, and sometimes I'd put the food from the tray onto his spoon and feed him that way. He did love goldfish, puffs, cheerios, and graham crackers, and pieces of banana rolled in crushed cheerios so they were the foods I used to teach him to start self feeding.