Anyone can easily learn how to operate the safe lock from the user manual received with the safe.
In terms of operation safes with key lock are the simplest. Smaller electronic safes are also easy to use. Usage of a mechanical combination lock requires careful attention and accuracy. In case you have to deal with a more serious, multifunctional electronic safe lock, for learing the operation and performing the base programming or programming more complex functions you may need the help of an expert.
If you work at a company where safe operators often change and fluctuation is bigger or newcomers are frequent it comes in handy to hear about usage first-hand from an expert. In case a network of branches or shops are operated at your firm, user instruction due to changes is a common incident.