80 to 100 rounds, 2-3 hours of work on a single stage press.
#1 item. Get a reloading book or three. Read them.
#2 Read them again.
#3 Get a press., dies, Powder scale, Trickler, dial/digital calipers, case trimmer, bullet puller! (Tumbler, primer pocket swages, cleaners, reamers etc are extras you can get later.)
#4 Read those books again and decide on a starting point for your loads.
#5 buy the bullets, powder, primers for your decided loads.
#6 Read the loads again and rememebr min/max levels.
#7 Read the book again.
#8 Start reloading SLOWLY. Safety = #1. Ensure you take it step by step and check your work. Sloppiness at best can be a misfire, at worst it can seriously damage your firearms and injure you.
Options
#9 work up several loads from min to max loads. (Say 10 of each in small increments 0.2 - 0.4gr steps, assuming the .223 load).
Find the best patterning of those loads and look/want for pressure signs.