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This, get used to your grinder and you'll quickly get a decent gauge of it. First shot might still not be tip top but likely drinkable (and likely better than what you'd get from many coffee shop!), but the next one will get you well into the ballpark if not there.
I genuinely have never found h0me espresso to be a faff and you really can get consistently good results without spraying from tiny bottle, WDT and shaking and so on and so forth. Just takes a bit of sticking to it at the very beginning and getting to know the equipment.
Also if spraying around is an issue, just ditch the bottomless PF, spouts save clothes and don't diminish the result in any way.
To be more constructive: after a while you get a sense for what grind settings based on origin/roast level which speeds up the process but doesn't eliminate it. You'll need to adjust the grind as beans age anyway so constantly chasing the 'perfect setting'.