I'm new to this forum.I'm seeking advice on tacking.I get in irons many times when tacking
Beautiful boat! Can you tell us about it?
Tacking to windward, especially short tacking, is the heavy lifting of sailing.
I sail a yawl which doesn't have your ketch rigged mizzens power. Our yawls main IS the power to windward. Once pinched up tight, the mizzen mostly luffs gently in the mains flow(Doused in this photo which is better still).
Short tacking to windward, is all about speed. We need all our power. We need to trim sails for speed first. We need to keep moving- through tacks- to allow moving the headsail from deck to deck, especially if wind is light. Keep your boat going.
Your boat is similar in that it will take time to put it's bow through the wind.
I'd try with the mizzen alone as suggested, but also try it trimming the main centerline, even if the mizzen luffs in it's turbulence. Your mains power-forward, may allow you to point higher and maintain speed through your tacks.
Short tacking is work! But it's also one of sailings more rewarding tasks. Good luck.