I think whether or not it will be a fit for your family depends entirely on whether or not you make it fit your family. In other words, it is what you make it. There is no proscription, so you try things and see whether you like them, if they benefit you, and then decide whether you will continue or change, or whatever. It is very much an actual journey- not a metaphorical one.
I get that there are parents for whom unschooling means child-led learning and thereby commits the parents to the role of facilitating the pursuits of their children. I had this perspective for a while, but then discovered that my children and I all needed to regress this a few steps so that they could accomplish what they need to- to be able to facilitate their own lives- and I can accomplish what I need to in order to recognise myself in my role as their mother, which is to be a mentor, a trusted and loving "fan" in a sense- someone who watches their lives with relaxed anticipation that they will live as they ought to, according to their own determinations, their own ideals, and their own experiences.
So, for me, there is no random or intentional strewing, or filling the calendar with every possible experience in order to expose them to as much as possible so they'll be able to choose from a smorgasbord of possibilities. That's fine if that's who you are, but for me, there's just no way I'd be that person in their lives. If they need that, I trust that they will find their "right" people who will join them in enacting those sorts of experiences. I see them seeking out people already, who fulfill needs that I don't, and never will- not out of any refusal or lack of concern, but a major part of their maturation is in being who they are, and I have been recognising that my having been "all things to all people" has not been healthy for them or for me, so I don't do that anymore. It has been a struggle for me, but I've made a lot of progress.
Anyway, in response to your question, for me, there is no "drive" necessary, and patience is required for raising my children in any way I choose. For me, we're just a family of people making our way in the world, alongside one another, together, cheering one another on. And as many have written on this forum before, unschooling is what you do with your children when they are not in school, but all the time. If you normally fill the after-school hours with museum visits, various classes, mentorship programs and science camp, then do that still, but if you don't, there's no reason to think that doing so is necessary in order to live and grow alongside the truly amazing little people you have brought into the world to make lives, too.
Just be you. You need the same amount of drive and patience as you need to live your life, because that's what you are doing. It's really not as remarkable as some think it is. Just live. That'll do it. If you want something else, then do that. :)