What is a safe way to collaterise so that I do not get liquidated right away? Can someone give advice for people like us which are not traders and would not like to make a mistake? I am currently only practicing.
It is recommended that you have a collateral of at least 200%, to play it safe, even 300% is a best option.
As explained by others, never go below 200%, it is savvy to use collateralization ratios of 200-300+%. The volatility of ETH does not allow you to place a collateralization close to 100%.