I have looked into may different websites that claim to use your pc to gather bitcoin, in return for a small %. I am not sure but this doesnt seem very legit to me. Would it be more worth for me to invest in my own set up?
Actually lets clear some things here.
You can "mine" bitcoin. This is the official method to mint coins into the supply and that what mining rigs are used for. But to generate enough bitcoins to get a decent ROI (Return of Investment) you would need not one, not two, but several thousands of mining rigs along with electricity costs and maintenance costs. It is no longer consider profitable if done solo at your home.
Second, some site claim to install miners to mine some altcoins on your device and you can claim those coins later on once they reach a value. Avoid those, because they are installing malware and what not.
Third, there are cloud mining sites which sell contracts to hire mining rigs and you get paid for the mined coins. But in reality these are ponzi schemes, all of them, none are legit.
I hope you get your answer from this, if not let me know.