Introducing mMyself to this cCommunity

I'm from Venezuela, and I've been living ein France for almost 8eight years.

You usually write out numbers from one to nine. After that, you can write the numbers in numerical form.

I used to have a good level in eEnglish, but. However, learning and speaking fFrench on a regular basis has messed up my eEnglish.

Now when I try to speak or even think in eEnglish, I end up with mash up of ugly sspeaking a mix of Spanish, fFrench, and eEnglish.

Not very flattering, I must sayPersonally, I don't think that it's flattering.

On the other hand, I have never had the occasion to lived in an aEnglophoneish-speaking country, so I and don't get to practice a lot eithermany opportunities to speak English with other people.

Even if I read a lot ofvarious texts (e.g., literature and, articles,) in English and listen a lot of music in eEnglish, I can't manage to speak correctproperly.

I'm very much looking forward to learning with you all and toall of you and making progress with my eEnglish as. At the moment, I am willing to look for a new job -in the cultural field- —eventually!

What kind of job are you looking for?

Thank you very much for your attentionreading my text!

I'm from Venezuela, and I've been living ein France for almost 8 years.

I used to have a good level in eEnglish, but learning and speaking fFrench on a regular basis has messed up my eEnglish.

Now when I try to speak or even think in eEnglish, I end up with an ugly mash up of ugly sSpanish, fFrench, and eEnglish.

Added the oxford comma ("...bread, butter, and jam." "...cats, dogs, and horses.") but whether it's correct or incorrect depends on where you were educated.

"...a mash up of ugly/ugly-sounding..." would also be okay, but sounds a little more awkward.

(I prefer "mash-up" or "mashup" instead of "mash up", but I don't think it's incorrect.)

Even if I read a lot of literature and articles, and listen to a lot of music in eEnglish, I can't manage to speak correctly.

"Even if I read a lot of literature and articles..." - sounds odd, and 'articles' is unnecessary there, but I don't think it's incorrect.

Better: "Even after reading a lot of literature, and listen to a lot of...", "Even if I read a lot of books and articles..."

I'm very much looking forward to learning with you all and to progressing with my eEnglish, as I am willanting to look for a new job -in the/I am thinking about looking for a new job (in a cultural field-) eventually!

-ing, -ing, -ing: verb tense agreement.

"I am willing to look for a new job..." Not incorrect grammatically, but doesn't fit the statement you are making here.
Options:
"I am wanting to look for a new job..." - I am planning on looking for a new job. I have made a decision. (Soft decision: I could still change my mind.)
"I am thinking about looking for a new job..." - I am unsure if I really will look for a new job or not. I am still deciding.

I'm from Venezuela, and I've been living ein France for almost 8 years.

I used to have a good level in eof English, but learning and speaking fFrench on a regular basis has messed up my eEnglish.

Now when I try to speak or even think in eEnglish, I end up with an ugly mash up of ugly sSpanish, fFrench and eEnglish.

"Mash up of ugly Spanish..." kind of makes it sound like the languages are ugly rather than the "mash up" itself.

On the other hand, I have never had the occasionpportunity to live in an anglophone country, so I don't get to practice a lot either.

"Occasion" doesn't sound quite right. "Opportunity" or "chance" sound more natural.

I'm very much looking forward to learning with you all and to progressing with my eEnglish, as I am willing to look for a new job -in the cultural field- eventually!

It's better to keep the tense consistent throughout the sentence, and since it starts with "looking" it should also be "learning" and "progressing".