Welcome to the forum.
Cannot comment directly on that county, but most experienced folks in Texas prefer a 25% royalty and only a three year lease with no option to extend. If you have not leased before, it would be very wise to get a good oil and gas attorney to review any draft leases. The drafts are rarely in the mineral owner’s favor and need significant edits. An investment in good advice up front can reap better royalties if the well(s) are successful. The Directories tab above has several good Texas attorneys.