Look on the other side of the wall from where your bath faucets are located. There will probably be a panel that can be easily removed to get at the faucets and much of the tub plumbing from the back.
If you can’t find a panel, I really suggest calling a plumber. Bath tubs are not made to be easily removed and, while it may cost for the plumber, the cost to replace drywall, tile, plumbing fixtures, tubs and other parts could be a lot more.
Henry in MI