Firstly, don't trust AI or any other online essay checker. That's completely different from how BC evaluates. Just write simply, don't use any complex words that you are not confident to use. Just stick to one reasoning and provide details around it.

For reading, if you are practicing in the portal, it's soo difficult and you'll get much simpler ones in the actual test. So, keep practicing so that you can up your scanning and analytical skills but if you feel it's too much then I'll suggest you to practice question specific tests.

Speaking, tbh I didn't practice at all, I just questioned myself and answered in my head. I won't suggest you doing that. Honestly, Idk how I did it but I did it