Stupid Mistakes

I find myself having three problems on the LSAT

Lack of stupid errors, overlooking one particular word or reading something as "drowning" instead of "Downing".

In Flaw and NA questions, I usually understand the flaw. For example, I can tell that its confuses sufficiency for necessity. HOwever, I struggle to connect my hypothesis with the language in the answers.

The last is a lack of attention and struggling on RC passages, especially when it comes to inference questions

I would appreciate any help or advice, thanks