Father Died in 2015: Any idea how to find his wallet adress?

Not to make this opening far too long but my Father pased in a tragic accident in 2015. He was always very "techy" and into whatever was new in the tech world. We know he had bought bitcoin, it was a huge fight between my mom and him when he did.

I am about ready to go off to college and made it my mission to find this secret vault of college funds before I go off and away.

Given that it is 2024, and he died almost ten years ago, we have no access to any computers, phones or emails he had. (I do know his primary emails if that helps)

Is it a total shot in the dark to try and be one of the mythical few to find and unlock a dead wallet?

I come to you all, as a young woman who has some base line knowledge in the crypto world and no real ideas on how to track his wallet down.

I know that he did buy and sell, that he often did so with his LAN buddies during the events. Would it help if I asked for thier wallets to try and backtrace?

Are there any recommend steps I should take?

Note: I already tried coinbase, all the emails that I did know had no hits, of course, he may have had a hidden email for trading, which, is entirely possible.

Thank you in advance if you do happen to read this and toss any assistance in.