Isabel, I don't know if this will help you. I restated some things, rather than correct exactly what you have written. 

Job in my country

There are several groups of people who have important problems to find a job.

                                                             ...who face major obstacles to finding a job.

In the first place, we can speak about young people who haven't a goog qualification. They left school very young and didn't get a degree.

One group is young people who left school before getting a degree. 

On the contrary, many young people have a hight academic training. They studyed at the university and got their degree. Now they are studying one or two languages to get a good job but they can't find it so they have to look for a work abroad.

Another group is young people who have a high level of academic training. They obtained a university degree and studied one or more languages, but still can't find a good job in Spain, so they look for work abroad.

On the other hand, People who are over fifty and they have lost their job. They can't find a new job and they are too young to retire then they try to set a company and self-employed, but it is too difficult because they need money to run a company and they can't borrow a loan from the bank.

A third group is those over 50 who have lost their job. They can't find a new one and are too young to retire. Some may want to start their own business, but can't obtain the financing they need. 

Goverment says the economic situation is improving but I didn't think so because there are many families haven't enought money to survival and they are still as poor as they were some years ago.

The government says the economic siutation is improving, but I don't think so. There are many families who don't have enough money to survive, and they are as poor as they were some years ago. 

In conclusion, one of the main problem in my country is unemployment as well as low salary and it is a great social problem which should be the main problem for the government but I think it is not so.

In conclusion, unemployment and low wages are significant problems in my country. They are major social problems which should be addressed by the government, but I don't think that is happening.