Mtinaz,,,You are getting a lot of good info...I'll add my .02..
Since you are just starting, get yourself a Lee Second Edition..Reloading manual..It will give you a lot of information on the whys and wherefores of loading and while I've been reloading handgun ammo for many years, I learned a lot about the bottle necked rifle cartridges after I got mine.
You asked about mounting a powder dispenser. I mounted mine on a square? piece of plywood so I can move it around on my bench as I need it... It also doubles as a portable platform for when I want to take my smaller press to the range, when working up loads..
Before you get too far into mounting your equipment, I strongly suggest you clamp items into place and try them out on dry runs to insure they are conveniently placed and not interfering with each other...if you have the room on the bench.. I'm right handed and most of my loading activities (picking up bullets, spotchecking powder charges, feeding my trimmers, etc.) wind up being done with my left hand and I need just a little more movement room in that area..
Instead of your impact (kinetic) bullet puller (I've broken two with rifle cartridges), get a Hornady (my preference) or RCBS collet style puller.. It's faster, easier on your wrist/arm and works with your standard press..I seldom leave marks on the bullet pulled..
Plan on as much storage places as you can talk wife/S-O into as you will find the accumulation of items keeps increasing.. I went from one reloading bench with few shelves to three benches and several shelf sets over the last few years..
My cleaning bench:
And more shelves over the loading bench:
Have fun with everything...Just be safe about it..