Here are pics of mine:
I have a 2yr old and a 7 month old. I keep the passenger seat leaned up a little (makes it easier, also the seat extenders help too, they move the seat up a bit) then when putting the kids in I just lean in and put my son in his seat and buckle him up, and for my daughter, if you have a brand new baby it may be easiest to either install though the back door onto the base or between the front seats (easiest with passenger seat leaned forward). For my daughter I just tilt the seat on it's side a bit and slide her in and lock her into the base, my kids love riding in the VX. My son is always knocking on the door when he comes outside trying to get in it lol. As far as getting the seat/base mounted, it's super easy. I keep a towl on the seat and pull the seat belt ALL the way out so it locks in, slide it through the base, pull it as tight as I can (I usually lean on the seat/base) and then on the base there is an adjusting knob to tilt the rear up which tightens it up so I turn that until I can't anymore. Let me know if you have any more questions or needs any more pics.