How to set a proper meal schedule when my 9 months lo's napping time is not fixed?

My 9 month old. Wake up at ard 7am. He will play till abt 10+ am then I will bathe him, give him milk n he will nap, 1-2hrs .. during his nap, I will bathe n cook his lunch, if he is still aslp by when I'm done then is housework time. Then when he wake up play till ard 12+~1pm then lunch ... after lunch cont play till ard 2+~3+ we will leave the house for activities outside. When we are outside he doesn't have a fix nap time so he nap on his own on his own. Dinner , he will eat with us so depending on what time we eat dinner. Then if still early he will have his play time, if not we will bathe him at ard 8+-9 pm then give him his milk n he will slp after that