IMO a powder scale is a must !
It is also handy to weight bullets, ammo, etc.
I have a Lee powder measure, I still weight every ten loads.
I started reloading 30 ++ years ago, did it by myself, reading all the books I could put my hands on. There was no internet, nobody to ask ...
It is a lot easier than it seems, however you cannot be distracted; depending on the powder you use, a double charge will fit easily in the brass and is really dangerous.
A couple of trays are nice, my first ones were home-made, a thick piece of wood, drilled, glued on a thinner piece ! The plastic ones are now so cheap it is not worth the work
When I have put the powder in all the cases in the tray, I take a flashlight and check the powder level are the same; takes 10 seconds per 50 rds, it is cheap insurance.
Good luck and enjoy !!!