My heart goes out to you.
Decisions ( just buying a car) are so difficult in the first year.
It is all overwhelming and the anxiety level just goes up.
It will all take time. If you have a choice of being near a grandchild....I would go with that.
Even if it meant moving in a couple years and continuing to do that .....an apartment, camper - temporary type housing instead of buying a home - and moving as they move. Can't beat a child for making you smile and forget your own problems for a while.
I wish you the very best. I moved three years after my husband died and I had the same job and friends to ground me and still it was a difficult move. No matter what you do it will take time but I know with God's help............somehow it works out.