Safari on MacBook Air, 2017 is being very very weird

Okay, this issues are really starting to give me a massive migraine to the point where I want to throw my MacBook out of the window and just buy an old 2001 windows laptop! LOL.
So I have an issue with Safari, well, actually double trouble issue.
When I type on the web page, and press the answer key, When I press control option shift down arrow on the webpage, press, VoiceOver plus right key to get me forward.
But it seems like it gets stuck.
I pressed VoiceOver plus up and it goes back.
If you want an audio demonstration, let me know off of the site a way I can contact you to where you can hear what I’m trying to do.
And another issue, VoiceOver, when I’m loading a page keeps on saying 90%.
Even after the pages loaded it says 90%.
Today, I can recall it said more than 1090%
Also, I’ve noticed that my Mac is saying, app name/not responding more often.
Okay, not a big deal, but both of those issues are really annoying .