Word press website error fixing Need

Dear Freelancer , I NEE WORD PRESS EXPERT WHO CAN FIX THE ERROR WITHOUT ANY EXCUSE . IF YOU FEEL YOU CAN WORK ON THESE SOLID POINT THEN ONLY APPLY . 1st ) Essential need to fix . Too bad, your website is using inline styles. Too bad, your website has too many CSS files (more than 4). Too bad, your website has too many JavaScript files (more than 7). Load Time 3.85 second(s) (9.1 kB/s) prefer ( 0.16 second(s) (309.07 kB/s) Mobile Speed These points need to be fixed . ( Essential ) 2nd) Essential need to fix Eliminate render-blocking JavaScript and CSS in above-the-fold content Reduce server response time Minify CSS Minify JavaScript Minify HTML Mobile Viewport The content does not fit within the specified viewport size. ( If you can fix this point then please fix ) 3rd ) url , why these are repeat . ( essential ) need to fix . The actual pages of the website about-us while other pages are opening but there is no pages insider the store with the page id . about-us/page/10/ about-us/page/11/ about-us/page/3/ ONLY I WILL PAY AFTER YOU FIX THE JOB I ALWAYS PAID BUT THIS TIME I AM NOT HAPPY WHOM EVER DEVELOPER I HIRED THEY GOT PAID JUST NOTHING THEY MADE ME HAPPY .