If nobody has corrected this yet, the reason may be that there aren’t really any major mistakes. My corrections are in ALL CAPS so you can clearly see them, but normally, we should avoid using ALL CAPS :)

First of all, we need to use a blank space after every punctuation mark (except a hyphen). Take a look at my version, and notice where I’ve added spaces. I’ve also changed a comma to a period (after “…play it back” and “…but keep with it.” On the other hand, the word “so” should be preceded by a comma, not a period.

Second, although “kind of” is usually pronounced /ˈkaində/, we never write “kinda” unless it’s an informal text message between fellow teenagers. Actually, some less slangy versions would be “somewhat” or “a bit.”

“Complement” (perhaps 补充) is not the same as “compliment” (perhaps 恭维 or 赞扬). Native speakers mix these two up all the time, since the pronunciation is identical. See “usage:”

https://en.oxforddictionaries.com/definition/us/complement

Here’s my version with a few corrections:

Lots of people are kind of tone deaf. They are shy about singing. As a matter of fact, singing IS all about practicing and making smart choices, so here are some tricks for these people to get up (I’M NOT SURE WHAT YOU MEAN EXACTLY BY “GET UP” — CAN WE REPHRASE THIS?) to sing.

First, choose a song that compliments your voice. Naturally we would (OR “WILL” OR “SHOULD”) choose a song that we like, but actually (OR “IN FACT”), we should choose a song that complements our voice.

Second, record your voice and play it back. It will terrify (THIS WORD IS REALLY STRONG) you at first, but keep with (or “at”) it. Once you are confident, go for it.

Here’s a version where I’ve taken the liberty of suggesting some additional stylistic improvements to take your writing up a notch:

Lots of people consider themselves to be a bit tone deaf, so (“so” or “consequently” indicates consequence, or we could use “but in reality” to show a contrast) they are shy about singing. As a matter of fact, singing is all about practicing and making smart choices, so here are some tricks for these people to get started singing.

First, choose a song that complements your voice. Naturally, we will choose a song that we like, but ideally, we should choose a song that works well with (or “is well suited to) our vocal range and timbre (I changed this just to avoid repetition).

Second, record your voice and play it back. The sound of your own singing voice may be rather surprising at first, but keep at it. Once you are confident, go for it.