That is awesome! Shower her with affection, but if she pulls back, don't push it. It may take some time, but she will miss out on that affection that she craves. There is sort of a catch-22 going on here. She won't believe you love her, and won't let go of monogamy, because you are perceived to desire polygamy. That will be interpreted as not desiring her, and when you make an attempt to show her the love that you have for her, in her mind, she will question your motives for doing so. Do it anyway! She needs to know that you love her and desire her, and that you want her. One thing I have discovered recently, is that we as men desire our wives, and they need us. Sort of like how God desires us, and we need Him. So often, they project, wanting to know why you need a second wife, when the fact is, you don't really even need the first one! Help her understand this. She needs you to desire her. God doesn't need us, but He desires to have us. She projects her own needs, thinking that if you don't need her, you won't want her. Then, she extends that to want to know why you need a second wife. Of course you don't need one. You want one. God gave you that desire. I found it so liberating to tell people that God has given me this desire. That forces them to try to argue that God would never give you the desire to sin. I agree; God gives you the desire to marry, and that desire is not sinful.
I strongly suspect that if you fail to follow all of the recommended steps from your pastor, Grace won't hold you to them. We often project our own logical thinking onto our wives. That's not how they work! If Grace sees how much you desire her, she won't care if you follow those recommendations. She admires you, but this whole polygamy thing has left her with a world of uncertainty, and she does not know how to handle it emotionally. The thing is, you could follow every one of those steps, and she could still walk out on you. You could follow none of them, and she could still stay with you.
The patriarchy thing is a good idea, but it might be too soon to drop that on her. Down the road, it certainly is something you will need to adopt, but that is only after you know that she is not ready to bolt, at least right away. The funny thing is, when you shower her with love, she will probably have the mistaken idea, that you are no longer interested in polygamy. She will have to have three or four "rude awakenings", and each time, this will further reinforce the notion in her mind, that you are only showering her with love, in order to get her to come around, which means that you don't genuinely love her, but rather, you are putting on a show. That "Red Pill" that we have been posting about, comes in handy as you go along, because she will see you acting differently, and she will like it, and she won't. It will come across as very masculine of you, but she has grown accustomed to a less masculine you, and she will want you to stop, which is where the disciplinary measures will be useful. You can't go back to that feminized self that you have been led to believe that you are supposed to be.
I knew my wife was ready to accept PM, when she told me that she could feel God's love for her, through me. Women are self-doubters, and Grace will try harder to be a better wife, in a vain effort to make you no longer desire what God Himself has given you the desire for. She wraps her sense of self worth and her identity, in your desire for her. It is difficult for her to see that polygamy and your efforts to get her to come around, are in fact a result of your desire to keep her. You don't really need her, but you want her anyhow, but that is hard for her to wrap her mind around. God gave you the desire to have her, and you don't want to lose her.
It's funny with this Covid-19, our church is doing online services, but we watched a couple of them, and my older son doesn't like that, so now, Sunday mornings or afternoons or evenings are "preacher daddy" time. I know Scripture well enough, but I am really having to sharpen up my presentation skills, as I am not big on public speaking. I do much better in one on one, or one on two or three settings. Getting stretched is not fun, but it's cool.
You are preaching to Elihu dude. I have never met you but I recognize your good heart. I am sure your good advice is needed by someone.