If you buy a similar model from the same manufacturer, you can leave the sink fittings in place. Unplug the power and disconnect the waste pipe. Undo the bayonet fitting securing the waste disposal unit to the sink fitting. Fit new unit to sink fitting, reconnect waste pipe and power. Run the unit with plenty of water to check for leaks. Job done.
Drink beer and then recycle glass bottle or aluminum can
Then research recycling route for all recycled and non-recycled waste products If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7