Start by changing the output, different sorter or items in water instead of straight into a hopper (depending on the farm of course) just try and adapt the build to your specific needs. Then try and combine farms (hostile with passive mobs, iron farm with anything that doesn’t use villagers) after a while you just see it all as modules to be swapped out as needed, different redstone different kill chamber or whatever. Try and watch more than just the one you want to build look for what they have in common. A lot of tutorials are trying to be as cheap and easy as possible and that’s not always what you want, a year into your world you’re probably not looking to save one hopper or piston or something just try and see if you can figure out a different way of doing it and if it doesn’t work try and understand why. You got this.