The safest is don't trade forex.
Because there is a high chance you will be in the majority category.
The majority of the traders ( about 99%) lose money trading forex.
Only 1% make it after they try very very hard developing their own holy grail.
Go and do anything like being a professional gambler,
forex coach, doctor, cleaner, soldier, loan shark runner,
sports man, wrestler, scientist, technician, spy, snake oil seller .... Go do anything except being a trader.
Of all the professions in this world, being a trader means chances of success are extremely slim.