How many dimm slots does your motherboard have? Also what CPU?
If intel with 2 dimm slots, try 1x8GB to see if that's enough for the time being.
If Ryzen then you either should get 2 dimms to run dual channel as you'll see the benefit.
If you have 4 dimm slots I would get a 2x4GB kit and see how you go with it.
8GB is still a lot of RAM, especially if you have an SSD.
Just my opinion