I have had a right hip replacement since 1996. Being a LHD car it is a matter of getting my right leg in first and then slide my rear into the seat before lifting in my left leg. With to top down I often sort of stand on the crossmember in front of the seat and then slide down the seat back letting my legs slide into the foot well.
Getting in with the top up is a matter of getting my right leg in and partially on the seat then bending almost double to get my head and torso in. Once I can get my backside in I can get my left leg in as normal. Getting out is a reverse of the above.
I am 6ft tall and was once slim. I now have a bit of a paunch
