The best way to really know the answers is to try! AxCrypt is free, and even the Premium features are free to try for a month.
Yes, you can encrypt all or some files in some folders.
The file names are visible, unless you explicitly use the anonymous rename function after encryption.
The convenience of using AxCrypt for this scenario depends on the number of files and the size of the files involved, and what types of files and how you expect to use them. For some situations AxCrypt is a good fit, for others volume encryption like BitLocker or VeraCrypt,