question about disableing feed pages and address

hi i wanted to disable feed pages in my site (i have lots of errors in google search console)
i saw this page:
https://rankmath.com/kb/disable-rss-feeds/
i use this now so i have 2 questins, pls guide me:
1-if i use that code redirecto feed address to home page, it could have bad effects my site seo?
2- iahe this code in my robots.thx file:
Disallow: */feed/

after your code in your site and will disable feed pages and redirect to home page
do i have need this code in robots file too or i have to delete that?(i mean this: Disallow: */feed/
)

*- another question: how can i disble searched things in my site in rankmath? does it have any option for this issue?
(recently i saw this :
https://faragasht.com/search/Pass+Guaranteed+2024+Pass-Sure+Hitachi+HCE-5920+Exam+PDF+%F0%9F%90%80+Search+for+%E2%9E%A4+HCE-5920+%E2%AE%98+and+obtain+a+free+download+on+%7B+www.pdfvce.com+%7D+%F0%9F%92%87HCE-5920+Exam+Dump/feed/rss2/

i dont konow what is it but have this errore: Indexed, though blocked by robots.txt
so how can i disble searched worlds or addresses or … from index or see in google search concole