As long as you do something consistently, you will definitely get there. If HIT is overwhelming, maybe start with walking or jogging, anything to get moving. Diet need not cost you a lot as there are cheaper sources of proteins like eggs, beans etc. One can get in shape with the most basic of diets.  

In my personal opinion completely cutting sugar for your entire life is an impossible task. That is why you need to gradually reduce things that have made you over-weight. People who completely cut down on things go fine for a period of time but then are back to binge eating after a year or two. At my peak I was about 8% body-fat when I was training to be a bodybuilder. I did this by completely cutting down on sugar and oil and eating chicken breasts everyday (crazy, yes). But, that is unsustainable in the long run as we have only one life to enjoy. Now I try to eat everything in moderation.

Safe bet is to reduce the amount of sugar and carbs like rice, bread etc. and replace them with vegetables and healthy fats. Research has shown that the best type of cardio is HIT. Also, look into intermittent fasting.

Fitness advice gets outdated fast. You can find many helpful videos on Youtube that give you great advice than people on a language site. I personally like Scooby1961's channel (Scooby Werstatt).  

'慢慢吃' (man man chi or eat slowly). I feel uttering this term at the end of a meal, when you have finished eating earlier than others, lets your Chinese friends/relatives know that you are no longer a ordinary '外国人' (waiguoren or foreigner) who is to be taken lightly. It tells them you're ready for Chinese culture and you mean business! :) 

By the way a very helpful article! 

Well, it means you should find a new friend :)

Seriously speaking,

1 First phrase means someone's behavior arousing pity or lack of respect.  

2 Sucker, means someone who believes in things easily or someone who can easily be fooled. 

3 Being your friend sucks means your friendship is disgusting and unbearable.