Trying to wrap my head around God is tough
Yes, MIke, it’s very tough. I even would say it’s impossible. Thus we need to engage more than the head in discernment, that is the heart, the guts, and especially our deepest desire. All of these are God’s gift for our vocation and fulfillment, for living our life to the full.
I merely want what God wants, but how does one truly know?
I think this is similar as with friends or with a spouse: talking and communing, that is engaging in the relationship.
God’s will is not something static and apart from us, something arcane that we have to find out as a puzzle or a quiz. God is the partner in our life and vocation, we can only walk it to the full if we engage in the dance of life with God. PRAYER is an essential piece on this. And then there is no such a thing as THE right or THE wrong decision because everything and anything we step into with this perspective is a step into growth in our life with God. It is not the outcome what matters, but the journey itself.
And of course taking the RISK of the decision is most important, which implies TRUST in God once we have worked our piece of thinking, pondering, praying, etc. etc.
Suppose I go to the seminary, put in six years and don’t get ordained. I could easily surmise that it just wasn’t God’s will.
If you spend six years of your life in the seminary, that will shape you for life whether you are ordained or not. We tend to think in secular terms of goals as if they where the only thing that matters… But maybe that is not the case with God. There is a quote of Mother Teresa I like especially: “we are not called to be successful, we are called to be faithful”.
All this that you are doing is a normal part of the vocation discernment, and is very likely that there is a true call for you. If you find enough weight on the vocation side, you cannot control the final outcome of your decision in the future, that has to be left in God’s hands. That’s the risk and the trust piece.
Know that you are not alone, you have the prayers of many people around you. So just … keep up the good fight! You will have always enough light for the present step. Take courage and go for it!!!

And let God the rest.
Blessings and prayer.