Hi and welcome to JA. I am Ray and will be the expert helping you tonight.
I am profoundly sorry for your loss of your daughter.
You can file for informal probate of the will if you file first.You file, they post notice and you appear in front of the judge and receive your letters testamentary.
If the ex files first then formal probate is the only option and you will need a lawyer at that point.
The letters testamentary here allow you to access the funds and convert it to an estate account.You really need to file for probate and secure property.You can demand return of anything taken and sue here if necessary or court orders return
Expect this process to take about a year here from start to finish.You hve to pay any claims, sell or transfer the house for the legal heirs
.All of this can take some time to complete.
Free forms for you ..
You may also consider a local lawyer because of distance and if you think there is theft going on with the ex here.
I appreciate the chance to help you tonight.Please let me know if you have more follow up.Thanks again.