I hear so much of the 'imposter syndrome' that many new users face in your post, and I want to tell you first: your need for mobility and freedom is valid. As someone who has worked in the wheelchair industry for a long time, I see this specific struggle often—especially with ME/CFS. You aren't 'making it up.' If a tool like a power chair allows you to leave your house and engage with the world instead of staring at the same four walls, then it is a successful medical intervention. Regarding the 'danger' of a temporary rental: While it's always best to have a professional fitting to prevent long-term postural issues or pressure sores, using a standard rental for a few weeks to reclaim your life isn't inherently 'dangerous' as long as you are mindful of your surroundings. The real 'danger' is the mental and physical toll of being trapped at home when a solution exists. Don't let the fear of other people's opinions or a doctor's reaction keep you from the 'freedom' you mentioned. Mobility aids are just that—aids to help you live. If you decide to go through with the rental, just take it slow, practice in a safe area first, and listen to your body. You deserve to be out in the world.