Thanks for the chance to help. I am an attorney with over 12 years experience. Hopefully I can help you with your legal question.
Yes. You will...that is, you will need to apply to the probate
court, with the original will, to begin probate.
It is the court, not the testator (the person who makes the will) that decides will will perform as executor (the person who administers the estate
Now, in the vast majority of cases, the court will appoint the person listed in the will to administer the estate. But you have to apply to the court to start the process
If you contact the clerk of the court for the probate court in the county where the home is located they can provide you the froms to start the process
Now, if the total value of the estate is less than $100K there is a streamlined process you can use which would not require a full probate.
Once you start the process, the court will provide you with documentation which will allow you to sell the home as executor.