Leave yourself something to go back to and you have already decided you will go back.
A partial deal feels like progress and works like a leash. Accept it and the belief riding underneath is that the old arrangement still holds a claim on you, which keeps the body half-turned toward it, which makes every step tentative, and tentative people get marched back.
Not knowing what serving God will require is the normal condition of anyone whose standard has outrun their means. The means get disclosed on the road, after the going has begun, never at the negotiating table beforehand. Hold back one animal and you arrive at the mountain without the one thing the service turns out to require.