I had a two door car up until a week ago, so for my DD from newborn to 16 months. I had no problems with it, never struggled to get her in or out. (Love having a small car for so many reasons!)

My DH on the other hand could not handle it at all. Not sure if it because he is tall so had more trouble bending over to put DD in her capsule or whether he is just a little grumpy and whingy about some things that are not perfect and easy . (Methinks it is the latter!) ...actually I think part of it was that he struggles with the act of strapping her in just as he struggles to change her nappy or dress her, he just can't do the fine details! I have noticed he still struggles getting her into the car now we have a 4 door so don't worry to much about my DH and his 2 door woes.

You should be fine!