How easy is it to fix my Olympus XA accidentally firing and advancing double? It happens about 20% of the time

I haven't repaired any cameras yet but I have bought some of the gear to do it. My XA has this issue where it'll sometimes trigger the shutter when advancing, and then advance ‘twice.’ I'm keen to have a go repairing it myself. I'm currently on holiday so won't be able to do it until I'm back home, unless there is a trick I can try. Would love any suggestions or advice.