Oatmeal is always wholegrain. For babies, you want the fine milled stuff, where the flakes are really small. Health food stores are the place.
My DS1 rejected most jars except for a veggie korma by Baby Organix.
Pear is often popular. Sweet potato and carrot are also good starters.
This time around, I plan to do like Pagan, possibly even skipping the liquidising, if DS2 will tolerate lumps. I'll probably be cautious and introduce one food at a time to get through the big allergen risks (dairy, egg, wheat) and then just give him table scraps.
I suspect that avoiding the jars (and breastfeeding) are why DS1 is a good and adventurous eater. His favourite foods are marinated baby octopus, and a Nigel Slater creamy, mustardy, spicy sausage pasta dish. He eats ratatouille. He loves mussels.
(Oh, you can give homemade food when out and about, although it's a bit of a slog. I used to take a capped avent bottle with a cube or two of frozen puree in it, and ask for hot water to thaw it in a restaurant. Of course, the sooner you move to the table scraps plan, the sooner this sort of thing is unnecessary.)