Let's upload the image to Tilda as it is. The image will be cropped to 1680 x 945 pixels, and its size will become 1.2MB.
Open the original file in Photoshop, change the image size to 1680 х 945 pixels and save it—its size will be reduced to 832KB.
Upload the photo to TinyPNG
to compress it, and you will get an 353KB image.