The high quality of your components can definitely benefit from better cables.
It’s always best to try cables in your own system to find a sound “you” subjectively like.
Borrowing from friends, dealers, and manufacturers when available is the lowest cost method.
Buying and selling used would also save you $. Keep in mind it’s easier to resell mainstream brands/models.
The Cable Company lending library for a fee may be a good option - make sure you know their restrictions
Iconoclast Cables has white papers that describe how they designed their cables- gives one a basic background on audio cabling design and cost
Copper is generally consider warmer than silver
Silver is generally considered cleaner, quicker, but may be bright depending on the audio chain.
A budget would be helpful, but it’s probably best for you to incrementally/conservatively move up the cable line/expense as you gain experience on what you like.