I just have one question about the switch. Can I use this switch? Will this one work? .....Any dpdt switch will work. However, not all toggle switches created equally, for best result, look for gold plated silver contact.
https://www.parts-express.com/SSP%20Applications/PartsExpress@SuiteCentric/SCA%202019.1/img/060-340_...
https://www.mouser.com/Electromechanical/Switches/Toggle-Switches/_/N-5g2j?P=1z0z2xkZ1z0z040Z1z0z2uv