Minimum PC Specs for mining.

I was thinking about mining myself. I have a GTX 1050 TI, AMD 4300 Quad-Core Processor, 16GB RAM, 1TB HDD.
Is that enough to start mining?

Also, is bitcoin basically just free money? I feel like it is? You just leave your pc sitting there all day just to. Well, gain money????? Bitcoin mining is so confusing to me. Can anybody please explain it?