Sleep training help


My son falls asleep after ten min of crying but wakes up everytime we come in to he bedroom and go to sleep he doesn’t have his own room and everytime it just cause my husband and I to argue idk what to do so right now basically I am letting him cry while my husband in the bedroom on his tablet what suggestions can I do I just always feel the worse when I let him cry it makes me sad discouraged and I just don’t know what to do