Wheel selection!

Hello! I would like to buy a few other rims and a few distance discs for my Volvo V70 soon. I don’t really know what to take with the distance discs, for the widening of the track. I don’t think you should grab the 50mm discs right away…Who of you has such a thing on the car? Should you choose a little bit narrower in the front than in the back? And the wheels should close nicely with the fender and not necessarily go beyond that. And now the core question e…How do I choose the right rims? The hole circle of my car would have to be 5/108, right? And what diameter can they have? Can you put 18 or 19 inch rims on it? I would also like to just have more rims and a little less tires… Above all, where does it start to look affable? It should already be noticeable, but discreet. It may also be a little more sporty. I don’t necessarily want to lower the wheel box. the whole car just a little more to my liking. The rims should possibly be nice black, like the car itself (tasting thing), but I am still superior!