Помогите найти ошибки в моем сочинении на английском

Nowadays there are a lot of different kinds of jobs and that’s why it is hard to choose your future career.
Biology is onE of the world`s largest industries and all of the most important inventions ARE NOT YET DONE (я бы так сказала) , so I want to be a biologist. I like natural sciences and I think I have AN opportunity to achieve success in this sphere.
I think, this job has many advantages. Firstly, it is very interesting to work in THE biology sphere. What is more, if you are a good specialist, you have a big salary and you are claimed. I have BEEN chosING my future career for a long time but yet I am not sure in this way. This job has some DISADVANTAGES (лучше))) , for example, it takes away all your free time and you haven`t got YOUR OWN (личная жизнь? ) life.
My parents and friends approve my choice. My mother has average medical education and she is glad that I want to follow her footsteps (можно и без футстепс)) .
I must study, be organized and hard-working and I hope I WILL become a good biologist, so after finishing school I will try to enter a university and to continue my education

Без претензий на безошибочность.. .
Nowadays there are MANY different jobs and that’s why it is hard to choose your future career.
Biology is an important component of the world`s largest industries like biopharmaceuticals for example. And I dont think that all of the most important inventions are discovered yet, so I want to be a biologist. I like natural sciences and I think I have opportunity to achieve success in this field.
In my opinion, this job has many advantages. Firstly, it is very interesting to work in biology sphere. What is more, if you are a good specialist, you have a big salary and your services are in demand. I have chosen my future career a long time ago, and I am confident it will work for me. Althou This job has some cons, for example, it might take away all your free time and seriously creaple your private life.
My parents and friends approve of my choice. My mother is a qualified nurse and she is glad that I want to follow her footsteps.
I must study, be organized and hard-working to become a good biologist, so after finishing school I will try to get a place at university to continue my education.

Now there are many various kinds of workplaces and for this reason it is difficult to choose your future career.
The biology goes the world ` s the greatest industries and all most important shelter of inventions ` t made nevertheless, thus I wish to be the biologist. I like natural sciences, and I think that I have a possibility to reach successes in this sphere.
I think, this work has many advantages. First, it is very interesting to work in biology sphere That is more if you are a good expert, you have a big salary, and you are required. I chose the future career during long time, but I am not assured nevertheless thus. This work has some arguments contra, for example, it cleans all your free time and you, a shelter ` t has received a private life.
My parents and friends approve my choice. My mother has an average medical education, and it is glad that I wish to follow its steps.
I should study, be organised and hardworking, and I hope to become the good biologist, thus after finishing school I will try to enter into university and to continue my education.

Nowadays there are many different jobs and that’s why it is hard to choose your future career.
Biology is one of the world`s largest industries and most of the important inventions aren't made yet. For this reason I want to be a biologist. I'm good at natural sciences and I think I have an opportunity to achieve success in this sphere.

On the one hand, this job has many advantages. Firstly, it is very interesting to work in the biology sphere, What is more, if you are a good specialist, you have a big salary and you are in demand. .But on the other hand, there are some disadvantages, like the fact that being a biologist is time-consuming and you cannot arrange your private affairs.

To tell you the truth, I've been chosing my future profession for a long time but I am still not sure about its correctness. Fortunately, my parents and friends approve my choice. My mother is a qualified medic and she is glad that I want to follow her footsteps.

To conclude I'd like to add that I must study, be organized and hard-working in order to be a skilled biologist. Obviously, after leaving school I will try to enter a university and carry on studying there.