The sister site can certainly help in providing information - thanks for mentioning Davit!
It is very hard for people to change for another person. Your husband has to want to change for himself in order to be successful. There are things you can try that may influence positive change though. You can be clear about your feelings and fears. You can help him to set small, specific goals and reach them. You can lead by example by exercising, eating well and setting goals for yourself. You can also buy and prepare healthy foods and have them on hand. You can ask him what small changes he wants to make and help him to make those changes. You can also share small bits of information with him. Be sure to ask if he wants to hear the info first anf be kind and non-judgemental when presenting information as sometimes people can become defensive about lifestyle change.