Scheduler/Calendar For SharePoint

I need a SharePoint Expert with skills coding using HTML, JavaScript, CSS, etc., Power Apps, Power Automate to code a scheduler/calendar with filters and color formatting. This person should be familiar with the class and modern experience and what can and cannot be done in either experience. This scheduler/calendar will be coded in SharePoint, but the person will need to know how to make it look as little like a SP site as possible using HTML, JavaScript and other languages. A timeline calendar view is needed. I will work with this person 24/7 to make these changes because I need a “quick” turnaround. What I have available to me: Microsoft Office 365, SharePoint, SharePoint Designer, Power Apps, Power Automate. Quick coding, maybe: to use SharePoint calendar as a scheduler in classic experience and modify it using html, etc. to have (day, week, month, year) view. Custom coding to add the filters, and then I will use SharePoint designer to update the calendar add/edit form. Not sure if the timeline view can be done in classic. One to two Weeks: Use the modern experience, but still using html, JavaScript, power apps, power automate to create the scheduler. Using coding languages to code a calendar/scheduler. I will code the add/edit form in Power Apps. But will need to see progress every day to start. If you have the expertise, or have done this before, please let's chat more on the possible solutions. I need to award and start on this asap.