Do I meet the conditions for Australian immigration?

There are points deductions for being over 29 years old

There are points deductions for not having a bachelor's degree

So your conditions do not meet the standards for skilled immigrants.

Are your wife’s relatives immediate relatives? It's your direct line that can guarantee your wife, and by the way, you can go out. But it also depends on your wife’s education and major.

Now that Australia is tightening immigration, many international students here have gone back. So judging from your above conditions, hanging!

Even if your application is accepted, Australian officials have now said that there will be no result within 3 years.

Good luck.

Don’t even think about employer guarantee, because employer guarantee requires the employer to provide evidence as to why such workers cannot be hired in Australia instead of hiring you. There are too many auto repairs here. Whether or not I can stay on the list of in-demand occupations next year is up in the air. And you are required to get 6 out of 4 in IELTS, and you need to get 6 out of 4 in IELTS.

Your best hope is family-based immigration. But there is not much hope.

Purchasing engineers are useless

If you just study abroad, there will be no problem, but it will be difficult to stay through formal channels.