The day has finally come to propose to my long term GF (12years) and I’m nervous

So my lady (F39) and I (M37) have been together for twelve years this December. I know it’s a long time without marriage, but neither of us has or wants children and I’ve been through some trauma from my two divorces previously (one of which left me homeless and made me give my dog away for adoption).

We’ve been living together for all but 6months of our relationship, and we get along well and don’t fight about money or anything crazy like that. We of course have had our share of rough times together but have never split up or went on “break”.

We’re finally in a position where I’m making enough money to consider purchasing a house, and I would want her to have an equal stake and legal protection in any property like that.

I’m just wondering, did I wait too long? Would it seem weird? I know she would hate a public proposal so I plan to do it at the little cabin we’re renting next week….I guess I’m just nervous about getting married again even after all these years.

Or do I just leave things how they are “if it ain’t broke don’t fix it” situation? I don’t know, I figured I would ask you folks for advice cause I don’t really have a big friend group.

TYIA for any helpful insight you might be able to provide me