Welcome to the wonderful world of reloading! May your Dillon bring you years of joy and personal satisfaction
Now to the business side....
What kind of scale are you using? If you want fast and ease of use, go with a digital scale. It's definitely not necessary because a good ole' beam scale will work just fine but the digitals are very nice.
Got a bullet puller yet?
How about extra primer pickup tubes? You can greatly increase you loading output by having extra pickup tubes.
How about a powder funnel? Once you start experimenting with different powders, the funnel is an absolute must! Otherwise, you'll have powder all over the place
I also use a RCBS primer flip tray. I have the huge Dillon one but the RCBS serves me much better. It's not quite as heavy and bulky.