Hi
If you're short of time BLW is the way for you, although the clean up operation can be a bit of a problem!
I started with banana. But have discovered that it is one of the messiest foods to give in a high chair so now I sit my LO in my lap to feed her a banana. She eats it as adults do in about 5 minutes!! It only takes a few minutes to wipe her hands and face.
As for introducing foods I have just given her food either as we eat it or when needed, specially cooked. Broccoli is a winner, as is par boiled carrots and parsnips. Other food we've tried that are fab are tomato's (deseeded to save some mess) pears (the more ripe the better as they are softer) potato's, boiled, roasted or chipped she's loves it all. Other foods that work are cucumber, avocado, courgette, fish, pork, chicken (meat is usually sucked to death) baby sweetcorn, bread was better lightly toasted otherwise it stuck to the roof of her mouth.
I found bell peppers and mange tout pretty useless as she couldn't 'gum' off any flesh or pull apart to swallow.
I have given her cows milk to drink just to introduce the taste, she couldn't get enough of it. You can use cows milk in cereal or porridge, but they would need spoon feeding so might be pointless!
As for spicy food, was your little one breast fed at all? I gave my LO pork and chili sausages, she didn't seem to acknowledge the spicy kick and sucked away. Apparently bf babies are more accepting of stronger flavours especially if mum has had a spicy diet throughout the pregnancy and while bf'ing.
My LO only had solids once or twice a day to start with. Now at 30 weeks old, she can have it four times a day depending on how she's been sleeping. One of those will be a banana that doesn't take long, other times are usually in the high chair. She can take up to an hour to eat sometimes but I use that time to either cook for myself or tidy the kitchen. You are supposedly meant to sit with them the whole time they eat but that is not practical!
The mess is a problem. It can take a while to clean up but I've learnt a few tricks on the way. I wrap a clean cloth around the buckle holding her in. This can stop the food getting ingrained in it. I only fold it over the buckle, just in case she ever choked and I needed to get her out in a rush! I use an old tooth brush to scrub around the nooks and crannies.
HTH
x x x