S34-7N-10W Oklahoma Offer to Lease received

I just received an offer to lease from someone in Norman, Oklahoma for Section 34-Township 7N-Range 10W in Caddo County, Oklahoma. The terms are $250 per net mineral acre with a 3-year primary and a 2-year option at $250. It provides a 3/16th royalty. This was my grandfather’s property, I live in Virginia and had an uncle who dealt with this the last time an offer was made. I only have partial shares. Does everyone have to agree to the same terms? What happens if I have no idea who else still has rights? I think the option for an additional 2 years is not a good idea, but then again, it has been a long time since anyone has approached about a lease. Any advice is appreciated. I don’t want to make a decision on my limited information and knowledge.