You have a build up of debris under the mower preventing the brake / clutch pedal returning fully.
It will be a lot easier if you drop the deck, drain the fuel tank , remove the battery & stand the mower vertical on its bum.
Otherwise you will be eating a lot of dirt & grass clippings.
If you don't want to lift it up then remove the mowing deck & get the mower as high up as you can because it is difficult to get in and clean it out with the mower sitting close to the ground.