So you're starting with 223 Remington.. what else, if anything, do you plan to load for?
The reason I ask is that some powders are more versatile than others, and may give good results in several different cartridges.
Also some powders are more temperature stable than others, which is always a good thing. That information is available if you look.
And as has been mentioned, availability is often a wild card, especially now.
If you have a store you'd like to use for supplies, check their powder inventory and see what's available that will work in a 223 with other available components.
Plan on a couple of trips, the first is for recon.
Spur of the moment impulse buys when it comes to powder might leave you wishing you'd done more research first.
Be aware that powders with similar numeric designations, such as IMR 4895 and H4895 for example, are NOT the same thing.