I just repeat that no one can guarantee 100% security for each wallet that will be selected. But of the three types of storage that the OP mentioned are absolutely not good storage to serve as a place to store assets.

Storage of valuable assets like Bitcoin I recommend Electrum and Bitcoin Core (desktop) and Hardware.
Then, how to use it must be well studied starting from the installation process (Electrum and Bitcoin Core) to other techniques such as avoiding going offline to a certain stage.