I didn't do solids with DD2 until 5 mo (and can't really remember the details about DD1), but I would suggest the following:
- offer solids initially only once a day and in a small amount (like 1 oz).
- time it about an hour after a formula feed, make it part of your LO's "A" time
- do it mid morning or no later than lunch so you can see if there are any adverse reactions to foods
Mine is 6 mo and we are currently offering about 2 oz of solids each at about 12:30 pm and 5:30 pm. She does not get a formula feed until at least 90 mins later. Always make formula the priority.
HTH