It's like any new technique you try Andy, takes practice for sure.
It's never gonna be a wet cut, not without some polishing afterwards, but the question will be, does it need a wet cut?
If it does, then use a wet cutter, I'd say probably 90% don't need to be though.
As we speak I'm cutting an alcove out the middle of a full bodied 1200 x 600 and mitering it, try that with a wet cutter.
Entry level for a decent grinder around £50-£60, but if you're thinking of it I'd strongly suggest the Bosch gws 7-115E from protilers for another £20, you'll then have a variable speed grinder too!
It has an 11000rpm top speed, so ample for cutting.
Blades? Now there's a minefield!
£10-£100 take your pick.
If the property is currently occupied, then cutting inside is difficult, you can reduce the dust dramatically with a cowl fitted for dust extraction with a vacuum.
If you've used a wet cutter for 30 yrs Andy then the transition will be awkward at times, it's a bit of suck it and see really, after that amount of time.
But if you warm to it, you'll find yourself using your wet cutter less and less, that's for sure.