Bleed the clutch. You added fluid and you may have air in there preventing full engagement of the clutch. 1st gear had synchros so it should not be tough to engage at a stop or moving slowly.
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.
AF Jeep Club Tail Number 184