what you need is to follow the directions listed in this post. Easel Local for Linux? - #17 by SamyKamkar it will download and compile the easel local as needed.
What you have is a system which has an ARM64 CPU and you are only given the choices of AMD64 X86 and PPC (MAC windows Linux) although the pi uses a LInux file system all programs for it must be compiled for the ARM architecture.
It is really easy to do and a lot of it is automatic so you should not have many problems to get it done. and when you are done it should be a very solid system. been using mine for several years now.