What am I doing wrong with dropdownlist save to database, entity framework, can skip to solutions 2 and 3 for latest delima

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SQL

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database

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I think the issue is in the create action, posting some code, NO ERRORS, just empty database fields for Categories, Priorities and Site_Admins fields on my tickets table, I am trying to create a page that will save to database, and then pull up a list of database items, When I click the create button on the create page, the list page shows up, Everything except those fields listed above are populated in the database or on the view page.
CONTROLLER:

public class TicketsController : Controller
    {
        // GET: Tickets
        
        Helpdesk2017Db _db = new Helpdesk2017Db();
     
        // GET: Tickets
        public ActionResult Tickets()
        {
            var model = from a in _db.Tickets orderby a.Date ascending select a;
            
            return View(model);
        }

        // GET: Tickets/Details/5
        public ActionResult Details(int id)
        {
            var view = _db.Tickets.Single(v => v.Id == id);
            return View(view);
        }

        // GET: Tickets/Create
        public ActionResult Create()
        {   
            ViewData["Categories"] = new SelectList(_db.Categories, "Id", "CategoryName");     
            ViewData["Priorities"] = new SelectList(_db.Priorities, "Id", "PriorityName");     
            ViewData["Site_Admins"] = new SelectList(_db.Site_Admins, "Id", "Name");
            return View("Create");
        }

        // POST: Tickets/Create
        [HttpPost]
        public ActionResult Create(Tickets Tickets)
        {
            if (ModelState.IsValid)
            {
                _db.Tickets.Add(Tickets);
                _db.SaveChanges();
                // TODO: Add insert logic here
                return RedirectToAction("Tickets");
            }
            return View("Tickets");
        }

MODEL:

public class Tickets
    {
        public IEnumerable<selectlistitem> Priorities { get; set; }
        public IEnumerable<selectlistitem> Categories { get; set; }
        public IEnumerable<selectlistitem> Site_Admins { get; set; }
        public int Id { get; set; }
        public DateTime Date { get; set; }
        public string Name { get; set; }
        public string Email { get; set; }
        public long Telephone { get; set; }
        public string Location { get; set; }
        public string Region { get; set; }
        public string ComputerName { get; set; }
        public long AssetTag { get; set; }
        public string Subject { get; set; }
        public string Body { get; set; }
      //public  File
      //public  File  
      //public File     
    }
}

CREATE VIEW:

@Html.DropDownList("Id", ViewData["Site_Admins"] as SelectList, "Assign To", new { @class = "form-control", @id = "Id" })
            @Html.DropDownList("Id", ViewData["Priorities"] as SelectList, "Select Priority", new { @class = "form-control", @id = "Id" })
            @Html.DropDownList("Id", ViewData["Categories"] as SelectList, "Select Category", new { @class = "form-control", @id = "Id" })

The list view is well just a basic list pulling from database,
I know everything worked before I added the dropdown list info. The dropdowns work correctly, the issue is saving selected item from create page, to add to database, along with other text on the page, and pull to list view as a listed "Ticket"

What I have tried:

I have tried every version of dropdownlist and dropdownlistfor code on the internet I could find, for the controller, the class and the view

I am almost positive the problem is in the controller code that I listed first.

I am using SQL 2016 express database.