You cannot choose “Hedged” or “Netted” types unless the options are offered by your broker.
To find out the type of your cTrader account, you may contact your broker directly.
Alternatively, you can find out by opening multiple positions of the same symbol on the platform.
In case of “Hedged” account, each position will be separately held and you can have multiple positions at the same time.
In case of “Netted” account, all positions will be calculated together and only 1 position per symbol will remain.