There are pro's and con's to all the different approaches to combat in pbp
There the
full theatre of mind where everyone makes their actions, and GM puts it together at the end of a round. (I think its called chaos initiative)
There is
full tactical with
OnTheFlyBattlemaps counting movement and strict initiative order etc.
I personally prefer it somewhere in between, but I can only advise :) If @JoshuaMabry what some help with the battlemaps I have some experience using those