The Food

One thing that I like (very) much, is the good food.
Quite some time ago, I changed my style of eating , before I liked eat a lot of the red meat, rice, desserts, soda pop, pastas of all forms, and the worst part was the amount of these foods that I ate. It had a big effect on my weight, and by that I mean that I couldn't exercise very well.
So today I have better eating habits, now I prefer to eat the healthy foods; vegetables, chicken , fruits, a lot water , natural juice, and now thanks to this, I can to do my exercises very well/much better , so my weight is better and I feel healthier.
Now I really like vegetarian food, and so I follow those eating habits. 

Eating healthy is life, do it !

Instead of saying eating forms or style of eating, it would sound better to say "eating habits".

"Desserts" was just misspelled and missing an S."Desert" is like the Sahara Desert and "Desert" is a sweet snack. Common mistake even for native English writers.

Autumn

Autumn has come and I want to make a "to do" list.
1) Make an English study plan.(This is funny, the first step of a plan - to make a plan. The second should be "follow the plan" and the third - "to attain success" ) Now I mostly write entries here or watch movies. I'd like to work on grammar. I realise, that my aim is not advanced level, but upper-intemediate, so I have to use basic grammar confidently, read and listen. I don't (think I) need get rid of my Russian accent if people understand me (my Japanese manager understands me well). So now I should revise my knowledge and study grammar systematically.
2) Read more English books. The first Harry Potter book was quite easy, so I want to go on and read them all till the end of the year.
3) Start to write my master's thesis. I have only a year, so I have to hurry up.
4) Collect douments and apply for a Japanese visa and
5) Travel to Japan. It has been a dream all my life, we have already bought plane tickets, booked hotel rooms in Osaka, Kyoto and Tokyo, and made a travel plan
6) Start to attend a teacher's course.
7) Get a new job. I don't want to work in the shop anymore. I hope there will be enough time to get a full time job towards the end of the autumn.

Hi, this was all easy to understand. Just a couple spelling errors and I revised some sentences to make them sound more natural and how a native speaker would say them

The 2018 FIFA World Cup

European teams were strong in the 2018 World Cup. The Japanese team had a good fight against the Belgium team in the first round of the final tournament, but they were too strong. They beat the Brazilian team in the quarterfinal, but they were beaten by the French team in the semifinals

By the way, why were South American teams beaten by European teams? European teams are organized and players are big and strong. Players in South America have a good technique but a little too much individualism. Players in Africa have great physical ability but a little too much individualism. When African players who have great physical ability are added to well organized European teams, it is natural that European teams become stronger. As for Japan's team, they are organized but their bodies are not big and their physical abilities are not as good/great as African players. We must find something to do against other teams.

If you are trying to say the South American and African teams are too focused on themselves you would say "they have a little too much individualism"

"too much" implies that that the individualism is harmful to the team. I'm not sure if that's you were trying to say but it looked like it so that's why I corrected it like that. Either way. Well done. 頑張ってね

Good life

Living a good life is very important for every one. So, there are many different idea about how to live a good life . And , having a good life it mean having an education, safe place to live, clean food and water, and prospects of a better future. Many philosophers say that to live a good life the person must be happy and many people are unhappy because they don't try to achieve goals. The person must set goals for them selves and work toward accomplishment them . But remember you have to work smart not hard.

Good life

Living a good life is very important for every one. There are many different ideas on how to live a good life . Having a good life means having an education, safe place to live, clean food and water, and prospects of a better future. Many philosophers say that to live a good life people must be happy and many people are unhappy because they don't try to achieve goals. People must set goals for themselves and work towards accomplishing them . But remember you have to work smart not hard.

If you are trying to ask if this person is your friend now, you would say "So are we friends from now on?" "I am so friend with you" - I'm not sure what your trying to say here but you can say: "I am good friends with you" to tell this person you have a close friendship with them. Or If you are asking them whether or not you are friends with each other you would say "So, am I friends with you?"

You may have just misheard. "Not much" would only be used if someone asked something like "What have you been up to?" or "What's up?"