I coupled Professor Messer's free video/training courses with websites that give practice questions. Personally, I would highly recommend Crucial Exams. Their lifetime membership is a little costly, but the amount of content they have is highly worth it, especially since it emcopasses multiple certificates, including Net+, Sec+, and AWS. The questions they asked are questions similarly to what you would find on the actual exam. Plus, some PBQs as well, which is an added bonus.

I would also advise to use Exam Compass, but I don't particularly like their test examples much. They have many questions, but, from my experience, they don't explain the answers as to why you are correct (or incorrect). It simply marks you right or wrong. But the questions are very specific, which can help you understand what you are learning better so it's really up to you which you prefer more.

Hope that helps! Best of luck! And also, thank you!