Hi there,
1. If you are looking for just the front end I would say it should not take more than 6-8 hours time, it completely depend how much features you want in your website.
2. Since I have been actively working on creating websites, developing AI/ML algos, as well as BI dashboards I have creative mind when it comes to UI/UX design.
3. I wont be needing much of your involvement, though a rough idea what all you will be needing in your website would be of great help
Cheers!