About Myself

"Myself" isn't technically incorrect, but "about myself" sounds better

Now I am a freelancer.

Now usually needs a comparison to before

I like cats, and I have 5 cats.

When you write "I like [noun]," the noun needs to be plural
Two parts of a sentence that can be standalone sentences need a comma before the and

However, I am very happy because I can fifound theis wepbsite thisat helps me learning English.

I'm not sure what you were trying to say, but I interpreted it like this

Now I am a freelancer.

You could also say “I work as a freelancer” or “I am a freelance (artist/writer/photographer/whatever you do)”

I like cats and I have 5 cats.five of them.

We (usually) write out numbers lower than one hundred.

Today, the weather is sovery hot.

“So” is technically correct but “very” would work much better.

However, I very happy because I can find the wep this help me learning English.

I’m not confident in your meaning here :(

My best guess is “However, I am very happy because I find this weather helps me learn English”

NRight now, I a'm a freelancer.

As is, "Now I am a freelancer" implies that this is a very recent change. For instance: "I just ate dinner, now I'm full." or "I just got a call from the company. Now I'm a full-time employee."

However, if you've been a freelancer for a long time, and still are a freelancer, I might say "Right now". The comma ( , ) isn't entirely necessary, though.

I like cats, and I have 5 cats.

When saying that you like something which is a noun (cat, dog, train), but you don't mean a specific, unique one of them (e.g. "My cat Eleanor" or "The cat that's always at the train station"), the noun should be plural.

Today, the weather iit's so hot.

You could also say: "Today, the weather is very hot." "The weather is so hot" isn't wrong, but it feels a little odd to me.

When describing the weather, a more natural way to say it is "It's ______" or "It is ______".

However, I'm very happy because I canould find theis wep thisbsite to help me learning English.

The usage of the conjunction "however" in this sentence to contrast against the last one is very natural. Nicely done!

Remember to use "I'm" or "I am" when describing how you feel.

"Can find", in this case, would sound strange. Finding this website was something that happened in the past, so I would say "could find".

Since we are on this website right now, it is more natural to say "this website" instead of "the website". "The website" feels like you are talking about a different one than the one we are on now.

You could also say, "...to help me in learning English", or you could break this up into two sentences and say, "...I could find this website. This can help me learn English." (Here, I have used "can" instead of "could" because the action of helping you learn English is something that will continue into the future).

NCurrently,/Right now, I am a freelancer.

I like cats and I have 5 catsof them.

However, I'm very happy because I canwas able to find theis wep thisbsite to help me learning English.

Now I am currently a freelancer.

There's a small subtlety thing here, where starting a sentence with "Now" implies either a change in topic, or a comparison to some previously mentioned state. "currently" is a bit better here because it doesn't have the same implication.

I like cats and I have 5 cats.

However, I very happy because I canould find theis wep thisbsite to help me learning English.

Watch out for your your tenses here.

Hello everyone.

I like cats and I have 5 cats.

However, I'm very happy because I can fifound theis wep thisbsite to help me learning English.