@Margotshypotheticaldog OP, I have a few teeth missing, and got a partial denture for the couple of gaps that show when I smile. It is made of valplast, it is moulded to fit over a couple of my remaining teeth. It is comfortable and gives me confidence when I'm out and about, although I must admit I tend to remove it as soon as I arrive home, because I find eating and drinking a bit more comfortable without it.
@Marshmallow91 Your diagram shows similar gaps to my own teeth. Re the wisdom teeth - I have had one removed due to decay, and don't miss it as it was sort of half set into the gum so I didn't actually use it much when eating. My dentist pointed out that I needed to take extra care with cleaning the back teeth - perhaps this is a common issue, as the teeth right at the back are more awkward to keep clean? I also have a couple of fixed bridges (basically false teeth which are permanently fitted to crowns on adjacent teeth). The fixed bridges work well but I'm unsure if they would be possible to fit if someone has ongoing gum disease? So, with a mixture of fixed bridges, crowns and a partial denture I feel OK about my teeth and only have a couple of gaps which don't show when I smile, but because my upper 6 front teeth were all crowned over 20 years ago I am aware that as those teeth start to fail I may need to think about getting some implants with a fixed upper denture.
All this makes me wish I had taken better care of my teeth as a teenager (too many sweets, plus a drill happy dentist), but anyway my partial denture was a much cheaper option than having two implants, and has served me well for a few years now. So, I'd say don't be too worried about a partial denture, and don't hang on to teeth that are clearly beyond saving (dental pain can be agony!) but at the same time, try to preserve the decent teeth you have left, as they are mighty useful to support a partial denture.
Good luck to anyone going through similar problems, and despite the perfect white teeth you see so often in the media, bear in mind that perfect teeth are rarer than you think (expecially once you're over 30, but people don't like to admit these things to each other, for fear of people judging them for perceived dental hygiene failures).