Can somebody give me a link or something where I can find out what I have to do if I want to forg/mine and which hardware in need for it?
Yes, from op: you may download the wallet here
https://github.com/Heat-Ledger-Ltd/heatwallet/releasesand just run it locally, it's the easiest way imo. THere's a "start forging" buttion in the client. You must have some heat balance with minimum 1440 confirmations on it afaik to start forging
Other option is to set up the VPS as instructed here
http://heatnodes.org/?p=1 But I prefer local wallet