When to start solids depends on your pediatrician and where you live. My pediatrician was trying to get me to start cereal at 3mo because dd was having issues bottle feeding. I ignored him because he was wrong (according to my mommy intuition
) and started cereal at 5mo. But yes, in most countries they recommend waiting to start solids until 6mo, especially if you are breast feeding.
Not real sure there is a "typical" age when that early morning feeding goes away. There are many moms who are doing them for a very long time. Once we started EASY (around 7 weeks) it took about 2 weeks for them to go away. I found that the feeding started getting later and later until her basic awake time settled at about 7:30am.
You can try to limit this feeding some in order to help her be hungrier at the 9am wake up and feed time - if you bottle feed, you can try to limit this feeding a little - maybe offer her fewer oz. If you breast feed, it can be a little harder, but you can try to limit the # of minutes at the breast. For us, I just rode it out and fed her the usual when she woke and ended up with some A time before E for the rest of the day until she started waking later to eat. You can even try just getting her to go back to sleep using pat/shh (I never tried that tbh).
I think 10:30 for a dream feed would be fine. Since her day starts later, it may mean she doesn't take as much in for the dream feed because the last feeding of the day is so much later than most folks. Vaden usually had a 7pm bedtime and 11pm dream feed, so she was getting at least 5 full feedings a day, that might be why your dd is waking for that early feeding - because she's not taking enough at the DF because it is so close to the last feeding of the day.
You might even consider bringing that last feeding of the day a bit earlier - maybe even right after the catnap. There wouldn't be a full 4hrs between the last two feedings, but I know at least for my dd, she is always hungrier at night and will take a full feeding before a full 4hrs. So maybe instead of the last "daytime" feeding being at 9, make it at 7:30 or 8 so that there will be a little longer between the last feeding, and the DF and she will be hungrier and take more in. I don't think I would recommend doing the dream feed after 11, because then it is considered a night feeding, and could interrupt her sleep more.
Oh, I think I've probably typed more than I should
Sorry! I am a bit too wordy, but I hope it helps some!!