There's an English saying : It's the thought that counts
There's also an Arabic narration: انمال الاعمال بالنیات deeds are ranked by the intention.
However, these photos will also including their loved ones as they grew up, and will be irreplaceable memories
We have all sinned. We have to repent, We can't put in a nail in our brain to destroy that piece of memory. You're not committing any sin by looking at your old pictures, possibly with your grandma, uncle, aunt, etc. Some who have departed. Keep those memories alive, in Islam the meaning of صله رحم (tying with your kin) applies even after the person is dead, as you visit their grave and see forgiveness on their behalf, do good in their name.
Just remember whenever you see those pictures say الهی العفو، استغفر الله + Alhamdulillah that I was guided just as it's said on your profile | Please don't take away this guidance from me.
As a side note. Something that may be worth knowing is that:
AFAIK Islam is a religion that has core guidelines. It's not a religion that would tells you, when x happens while Y has happened and then if Z was less than then you can do such.
It's more a religion of X is better (because of such and such). Y should never be done (because of such and such). Z is doable, but not really good. (so go figure out yourself).
You ask many questions on ISE, which aren't about core Islamic guidelines, rather you are specifically asking about how to apply it, your are narrowing it down. ( And since you are a convert your case is very different, I mentioned this so you get a better understanding of Islam)
Such questions are OK to ask, but it's best that you realize you are asking for suggestions rather than actual Ahkam. You are suppose to understand/fathom the core guidelines + apply them using your own wisdom. Not other people's wisdoms. At max what another can do is, explain the details of that guideline. You should apply it yourself. You know the whole situation yourself better. If a scholar starts giving such narrow guidelines publicly it becomes somewhat hard for others to understand where to apply what.