I want to join a pool because it is more profitable than single mining, isnt it? Please correct me if i am wrong because i dont know anything about this topic.
Joining a pool is to prevent payout variation from affecting your profits. When mining solo, it's extremely unlikely that you will mine a block (unless you have an extraordinarily high amount of hardware), so the purpose of pools is for people to "pool" their resources together, in the hope of finding blocks more often.I tried to join the antpool because it is the biggest one and a lot of people will become angry if the website shuts down
You do not understand mining pools and their relation to "cloud mining" sites. A "cloud mining" site can choose to direct their hashrate towards any pool or to no pool at all.i heard genisis mining is scam.
It is not a "scam" in that it hasn't directly stolen its users coins - rather, it takes them indirectly through a long process of ambiguous fees, misleadingly showing fiat profits, and a referral program.1. I want secruity
Then buy your own hardware.2. Can a pool or website be prosecuted and the investors get their money back or is it hard to do so
It's often difficult. Some Ponzi schemes (such as HashOcean) simply steal their users' funds and vanish.3. is there a german forum because my english is not the best 
Yes. Go to the German local board.I want something like invest 100$ and get 1 bitcoin in 6 month or something like that if you know what i mean.
Can you recommend something?
That's impossible. Actually, it's extremely unlikely that you will ever receive any profit from these schemes. Can you recommend something?