How to prevent ddos ​​on the site?

Question

DDoS Protection

Hey! My site is being ddsed right now, so I'll be very brief.
In general, a site with a decent income, some chuchundra decided that my site is not worthy of being in search and DDoSit. Turned on cloudflair and put under attak, the number of visitors decreased by 2 times:
1) How long can this ddos ​​last?
2) Cloudflair with this mode cannot make Yandex lower the site in search results?
3) Everyone knows that the best way is to buy protection for 15000, but is there any other cheaper way?
4) What if you set up a redirect to another domain? What will happen?

Answer 1

It is useless to connect cloudflare, leaving it on the old IP.
Move to a new IP (or a new server with a new IP).

Answer 2

https://qrator.net/en/