Football Manager 2020 system requirements state that you will need at least 2 GB of RAM. Provided that you have at least an ATI Mobility Radeon HD 3650 graphics card you can play the game. An Intel Pentium 4 2.40GHz CPU is required at a minimum to run Football Manager 2020.
https://www.pcgamebenchmark.com/football-manager-2020-system-requirements

