Frank, Jim started using a scooter at first to get around at stores or places where walking was a task for him. They are cheaper too. Eventually he went to a power chair because the house was against him and after several broken bones and stitches made to look like Frankenstein he gave in. He could still walk a few steps when he went into kidney failure which wiped out his muscles and went into the chair 100% of his time.
If your concerned, that's normal.

Maybe go for a scooter at first and see how things go from there. Remember if you are walking and your legs are not helping do that task your actually harming yourself and possibly putting yourself in danger. Use it as you need it at first. It doesn't mean your going to stay in it. It will actually give you more energy and less pain to do things longer when your out.
Plus, my house is fully wheelchair accessible so bring it on! You and Jim could have races down the street! lol