Long term I’d say a better camera and mount could make a difference but as others have said, if the general skills involved with astrophotography don’t allow you to get the most out of what you do have then you won’t see a big change with new equipment.
How long are your exposures at the moment? I’d estimate you’d best be with 120-300s at ISO 800-1600 to get the most out of each exposure. Then having good darks and flats allow you to extract the most out of a stack.
A better mount will make guiding long exposures easier but it may not make a big difference now. A new camera can decrease noise and make it easier to go deeper but if the other things aren’t in place then you may not notice a difference.
Processing is something that can be practiced at any time
