The Dillon 550's are amazing machines. Plenty fast, and while there are faster machines in the Dillon lineup, the trade-off is that the faster ones take longer to change between calibers, and the caliber conversion kits are more expensive. You can use the 550 as a single stage press, one cartridge in the shell plate at a time, rotating between the stations after each handle pull. It's a good way to start out and gain experience.
I've got a single stage press as well, used for larger rifle cartridges and the occasional oddball handgun cartridge that I don't shoot enough to justify the cost of a caliber conversion kit for the Dillon...but it sounds like those use cases aren't in your immediate future.
My suggestion is to get a single stage too. This way it's easier to build loads as for progressives I run two lee pro 1000s ones set up for large pistol primers and one for small.
The forecast for Sunday the 5th looks bad, 70% chance of rain. I'm postponing two weeks, as the following weekend is a most sacred holiday, Mother's day.
As of now, we are looking at 5-19-24 as the next shoot date.