Image Upload Tutorials and Advice

I am still very much a begineer in ASP.Net.  I stumble about and occasionally something clicks and I can get a lot of what I need done.

But this is frustrating me chronically.  What I want to do is add to an existing model the ability to upload an image to the web and retrieve as part of the final 'report' I will generate.  I have been having a pass at this now and again using tutorials I find online but none seems to actually work without little red squiggles, so I am either stupid, or the tutorials are for different virgins or ...probably stupid.

The code I am trying to make work this time are:

Extract from Equipment Model:

 [Display(Name = "Equipment Type")]
        public int EqTypeID { get; set; }

        [Display(Name ="Equipment Photo")]
        [DataType(DataType.ImageUrl)]
        public string ImageUrl { get; set; }

        public int Quantity { get; set; }

        [Display(Name = "Manufacturer")]
        public int MakeID { get; set; }

I then have a view model ImageViewModel, which I copied form the tutorial:

namespace Eva804.Models
{
    public class ImageViewModel
    {
        [Required]
        public string Title { get; set; }

        public string AltText { get; set; }

        [DataType(DataType.Html)]
        public string Caption { get; set; }

        [DataType(DataType.Upload)]
        IFormFile ImageUpload { get; set; }

    }
}

Following the tutorial broadly I have the following controller:

 public async Task<IActionResult> Create(
            [Bind("ConditionID,EqTypeID,EstimateRemainingLife,InstallDate,EquipmentImage, LastServiceDate,MakeID,Model,Notes,Recommended,ReplacementCost,SerialNumber,WaterBodyID")] Equipment equipment, ImageViewModel model)
        {
            try
            {
                var validImageTypes = new string[]
                    {"image/gif","image/jpeg","image/pjpeg","image/png"
                    };


                if (!validImageTypes.Contains(model.ImageUpload.ContentType))
                {
                    ModelState.AddModelError("ImageUpload", "Please choose either a GIF, JPG or PNG image.");
                }

                if (ModelState.IsValid)
                {
                    if (model.ImageUpload != null && model.ImageUpload.ContentLength > 0)
                    {
                        var uploadDir = "~/uploads"
                        var imagePath = Path.Combine(Server.MapPath(uploadDir), model.ImageUpload.FileName);
                        var imageUrl = Path.Combine(uploadDir, model.ImageUpload.FileName);
                        model.ImageUpload.SaveAs(imagePath);
                        image.ImageUrl = imageUrl;
                    }


                    _context.Add(equipment);
                    await _context.SaveChangesAsync();
                    return RedirectToAction("Index");
                }

            }

Which is hating ImageUpload, Server.Mappath and image.Imageurl.

Clearly this is wrong.

Where can I go for good tutorial?  I really have struggled with this?