To all masters and sifus out there please help me on which tools ans accessories to purchase for beginner.

I am purchasing a mini vertical mill similar to Seig X2. I am doing some aluminium parts.

1) What kind of milling bits should I purchase? (Rounding corner, slots etc)
2) Should I purchase quick conect R8 Chuck and collet? (Which type and size)
3) Other ensential tools like sanding or smoothing edge, cutting tools etc.

Your advice is very much appreciated.

Thanks