VivianChaste
You can start with a time locked key safe. Start with short time, an hour for example, and go from there and see how that goes. Maybe one day you will find a kh you can trust.
An other option could be a number locked key safe and use chaster.app (free to use) to keep the number of your safe hidden until release. And yes it is easy to cheat if you make a note of the number but that's up to you.
If you would start using chaster always make sure to choose a lock with a defined maximum duration. Maximum time can be minutes, hours, days, weeks, months, years, and indefinite. Always read carefully what a chaster lock does. You can create a lock of your own and configure it the way you like. But NEVER forget to set the maximum time or you may get far more than you bargained for. It also is possible to invite a kh to control your lock. If you have set a maximum time the kh cannot keep you locked longer than that unless you choose to set the option to trust the kh. The good thing is the kh can set you free immediately so you have some safety there. You can get to know each other in a safe and controlled way while the kh can be anywhere. But remember to always set a maximum time limit for your safety. And make sure you always have some backup if anything goes wrong.
You have a lot of information now. Enjoy whatever you choose to do.