Hi Steve, I did 3 months of reading about reloading before I even pulled the pin & bought my kit so my 1st bit of advice is don't rush, do some research & reading up about the process, what the various tools do.
Maybe even buy a decent manual, they usually go through the processes & the reason behind why various tools are used.
The RCBS kit(& most kits from other makers) have everything you will need start except dies, from there its up to you where you want to go.
Hell if you want simple & cost effective then just get a Lee classic loader-
https://www.instructables.com/id/How-to-reload-a-bullet-using-the-Lee-Classic-Loade/
Not sure how accurate the ammo is that comes out of it?
Plenty of sites around for info like accurate reloader etc to look at whats needed.
There is a caveat with these inexpensive kits demonstrated in the video: "Please note: The Classic Lee Loader neck sizes only. This is not recommended for semi-auto, pump and lever action guns."