I am a big fan of doing woodworking jobs in my spare time.

いいですね。

I'd like to makedo some small projects like wood stools, bookshelves, etc.

あるいは、

I'd like to make things like wood stools, bookshelves, etc.

In order to meet my demandcarry out my hobby, I have purchased a wide range of hand and electricityal tools which have filled my basement.

すごい！

「meet my demand」というのは、否定的なニュアンスがあります。自分の納得のためには、「carry out my hobby」というフレーズの方がいいと思います。

When I do some labor jobsphysical work, it really helps me relieve my stress and I usually feel tired and sweaty.

よくわかりました。私もと同じぐらいです。

I am enthusiastic about this kind of jobwork; it is a physically, and mentally demanding activity that lets me must concentrate, focus and become more skilled.

そうですよね。

Frankly speaking, I am not skilled inat it,. I do it very slowly, because it's a leisure task for me.

頭がいいですよね。

In order to keep myself safe, I continue to learn some electricityal skills and even passhave even earned a certificate as an electrician.

おめでとうございます！

Not only my family benefits from my hobbies, some of my friends often call to me for help, which I'd like to do.

いい趣味ですね！

I always do it very slowly, i. It doesn't matter forto them, because it's free.

ハハハ、いいですよね！

I am a big fan of doing woodworking jobs in my spare time.

Job implies that you are doing something where you will get paid. When it is a thing that you voluntary do for free, it wouldn't be considered a job.

I'd like to make some small projects like wood stools, bookshelves, etc.

In order to meet my demandSince I enjoy it so much, I have purchased a wide range of hand-held and electricity tools whichthat have filled my basement.

"In order to meet my demand" seems like you are running a business. Since this is just a hobby, you wouldn't really say something like that.

When I do some labor jobintensive things, it really helps me relieve my stress and I usually feel tired and sweaty.

I am enthusiastic about this kind of jobwork; it is a physically, and mentally demanding activity that lets me must concentrate, focus and be skilled.

Frankly speaking, I am not skilled in it, and I do it very slowly. However, it's just a leisure taskly activity for me.

This is a run on sentence. Too many commas, you should break it up.

In order to keep myself safe, I continue to learn some electricity skills and even pass a certificate as ahave gotten an electrician's certificate and continue to learn electricianty skills.

Not only does my family benefits from my hobbies,y, but some of my friends often call to me for help, which I'd like to do. Whether it be for family or friends, I am always willing to help them out.

This sentence would sound better if it was shortened.

I always do it very slowly, it. Since it's free, my friends and family doesn't matter for them, because it's freeind if it takes long.

This sentence would sound better if it was shortened.

I am enthusiastic about this kind of jobwork; it is a physically, and mentally demanding activity that lets me must concentrate, focus, and beimprove my skilled.s.

"Improve my skills" sounds more natural than saying something lets you be skilled :)

In order tTo keep myself safe, I continue to learn some electricity skills and even passabout and strengthen my skills related to electrical work, and have even obtained a certificate as an electrician.

Not only mydoes family benefits from my hobbies, but some of my friends often call to me for help as well, which I'd likem happy to do.