Start with the fact that good cabling is rather expensive.
Going one brand is easier and you get a house sound if you want that.
Going mixed will get you there but that will happen with more effort and probably more money.
Whatever you do (copper, silver, stranded or solid core) experimentation is required plus a good time for the things to settle down.
At the moment I use four different brands, even by mixing metals, silver for turntable, phono and speakers, copper for all the rest and I am happy with the result.