But with her naps how can you get her used to lunch at lunchtime etc or do you just not worry about that.
I wouldn't worry about what time lunch is just yet. When she gets a bit older and you drop down to one nap you could be giving 'unch' at 11.30am, or at 2.30pm! Later on she will get to have solid meals at a more 'socially normal' time.
Like Seona I give solids an hour after milk. To fit around naps you could try
6.30 milk
7.30 solids
10.30 milk
after 11.30 nap wake up solids (should be early enough not to disrupt the 2.30pm milk)
2.30pm milk
5.00 solids (after last nap wake up)
6.00pm milk
I don't know the reason your HV suggested solids prior to 6 months but just wanted to add that you bare in mind you don't want her milk to drop too much so it's ok that she isn't very hungry and doesn't take much in the way of solids just yet. Also you don't need to feed 3 meals per day (again unless your HV had a specific health reason why this would be needed).
You should monitor milk intake, if it drops too much you may need to cut back on the solids to keep the milk intake healthy.
hth