The Sram top 1 x 12{50tooth} is supposed to give the same ratio on gears as 2 or 3 by 10 or 11.
personally I would take a 2x before a 1x as the fronts are all 28 to 36 teeth and the 2x gives both and can take 50 tooth rear as well.

Your shocks are another story it might be easy replace seals new fluid reset. or full overhaul not to expensive either.