Get the wallet, run it and get an address + sync.
get the miner, here's an example .bat file:

minerd -o stratum+tcp://pool.slimcoinpool.com:3333 -u ADDRESS -p x -t NUMBERofThreads(Cores, double that if hyperthreaded)
you can one of the other pools, but this pool is the easiest, no signup necessary.
Simply replace the "ADDRESS" with the address in your Slimcoin wallet, and NUMBERofThreads with the amount of CPU threads you want mining., save it as a .bat file in the same folder as the miner, and run it.
I'm terrible at explaining things, so if you need more help, I'm sure someone else in the community can explain better than I.