my rating is 4.3 and now I can not send offers. is it true that after two months, I will be able to send offers?
You cannot unless you get orders without Buyers Requests.
No, you have to get your average rating up to the minimum Fiverr requires before you can send offers.
Jon has some good advice on how you can get orders without Buyer Requests.
I have NEVER sent a BR.
Maybe you might get lucky and someone will order direct from you.