Top of the page, read the FAQ's and Tutorials. This will end your 223/5.56 confusion.
There is a great 4 part "how to load 223" tutorial up there.
Start with Tac, BLC2, AA-2230, H-335 or W-748 in that order for powder.
223 is a
name, it does not reflect the bullet diameter. .224 is the correct bullet diameter for 223.
To reload your LC 05 brass, (which is high quality mil brass) you will need to remove the primer crimp.
You will need one of
these for $10.
Your Win brass will not have crimped primer pockets.
To start, buy powder by the pound to find which one you like.
Then when you make a bulk order, powder and primers, the hazmat is spread out and won't hurt as much.
Some SR, small rifle primers, are not suitable for the high pressure of the 223. These are Rem 6 1/2 and Wolf SR primers.
What you want is Rem 7 1/2, Wolf SR
M (small rifle magnum), CCI 41, Wolf 223 rem, CCI 450, CCI 400. Any of these.
Read up and keep asking questions, we will help.