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The best advice I can give is to not overthink it.
First decide on a machine. Do you want a pod machine, a bean to cup, a thermojet system, a machine with PID temperature control, a single boiler, a dual boiler, a heat exchange machine a prosumer machine or a lever machine.
Then decide on a grinder. Do you want a hand grinder, a blade grinder, a conical burr grinder, a flat burr grinder, a single doser or a hopper fed grinder, a stepped or stepless grinder, a grinder with a timer function or saving settings, or a commercial grinder.
Then what beans you want. Do you want light roast, dark roast, single origin, blended, organic, semi-decaffeinated, fully decaffeinated, washed or natural.
Once you’ve decided you’re good to go.