Honestly just go talk to your current peds faculty and resident as you aren't going to get much feedback here. You're probably going to get much, much more peds education in your curriculum to come, so then you can truly gauge if that is something that you are interested in.
Pretty much anyone that does a residency usually supports doing a residency. A residency will most likely just help you be more confident in controlling a pediatric exam for infants and toddlers for your objective testing, a lot more exposure to prescribing to ambylopic infants and toddlers, prescribing meds ror infants and toddlers, and vision therapy and more extreme cases of binocular vision disorders.
Its all about learning to do a confident exam on an infant or toddler, where you give the non-speaking, non-cooperative person the help they need while exuding confidence to their parents who are judging you constantly. You only get 5-10 minutes to work with this age demographic because otherwise they'll shut down (cry, tantrum, wont cooperate). Most of it will be binocular vision referrals.