All low hanging fruit were taken. You can ask good questions, but it would be too niche and nobody sees it.

People see your low reputation and will automatically reject your edits with generic reason, even when I gave very detailed explanation in the note.

There are some non-obvious customs when editing answers, that's unlikely to go well as a very new user. But editing questions mostly for formatting and language is certainly doable without any reputation.

I'm assuming the edits are reasonable itself, there are some odd patterns that you see regularly like people using code formatting (monospace font) for emphasis. That kind of edit will get stopped.

Another option to get the basic SO privileges is to ask or answer on any other SE sites. There are many of them, and almost all are much, much easier to participate in.

If people are rejecting legitimately good edits that's a problem. People looking through the review queue should be doing so with an open mind and an eye for the edits, not the person making the edits.

Search for "teh": 7306 results.

And that's only a typo. There's so much stuff that could be fixed...

I believe that's too small of a typo to fix, isn't there a minimum length required when editing?

Yes. I was pointing out that there's still lots of low hanging fruit, rather than this specific typo. But just checking out those questions shows lots of low quality stuff that could be corrected.