Too bad your Dad didn't have a trust. Could've avoided probate. The will must be admitted to probate as a matter of law. Fortunately, it's fairly straightforward. 2 assets, split between 2 beneficiaries.
At the end of the day, you could be a drooling, drug-addled retard. Doesn't matter. What your Dad instructed in the will prevails.
Your brother can fight you as much as he wants, but it won't change the outcome. Unless he wants to contest the will itself. Based on what you've said, I don't see grounds for that. Good luck.