Get a friend/ family members to drive you, between mountains or do it as a team with friends/colleagues, hire a minibus and have a designated driver/take it in turns. Get some good walking gear from mountain warehouse and do fitness training and hill walking for a few months before. Thats what most people do, including me.
I know you basically want to have a dig but whilst very physically hard (particularly on the knees) it’s really easy for ordinary people to do. As proven by the thousands of people who do it each year.
So if you want to do it, crack on.