Hi Suzie38.
The seat is not bolt upright, but is set at an incline.
The Bumper Bar can be up or down, but does not have multiple positions.
The handle, however, is very adjustable and you should be able to find a comfortable position.
I'm not sure what you mean by "free stand", unless you mean stand on its own? The Brio Go folds flat on the horizontal axis rather than vertical (not like a Maclaren, for example) and stands on its own. It takes up a lot of floor area, but not much height, if that makes any sense? Although, once folded, I guess you could prop it up, if you wished. You can also take the wheels off and store them in the body of the pushchair, so it takes up less room (useful for getting into the car boot, etc).
I find it lovely to push. Maybe not quite as dreamy as a Bugaboo, but nearly.
My only cautions would be to check you are happy with the harness (my bugbear with the Brio Go). Also, I have found, since I bought mine about a year ago, that the accessories are very difficult to get hold of. I can't find the toddler board anywhere and there is a very limited choice and availability of Brio foot muffs. Makes me wonder whether it will be withdrawn from the UK market, but who knows?