Hi
At the moment I am mining Monero and FantomCoin (without extra cpu) via minergate with 5 CPU systems simultaneously for the same account.
I would also like to try cpuminer instead of minergate
Can you please share detailed instructions on how to accomplish this
BEWARE
Check at the left side
I am a Newbie

Thanks for the newbie warning.
Unfortunately using Minergate is not a good way to learn. It's a good way to mine without knowing anything.
The key concepts are the coin, the algo the pool and the miner. The miner connects to a pool to mine a coin using an algo.
The miner is a software program used to mine in a pool. Some miners use the CPU to mine, others use GPUs. cpuminer-opt
is a CPU miner. Different miner programs support different algos. Some only support one algo, other are multi-algo.
Monero coin uses the cryptonight algo. There are many different algos and even more different coins as many coins may use the
same algo. cpuminer-opt supports cryptonight.
Now read the instructions in the miner and any pool you want to mine on how to put all this together.