In your Web browser, search the options of Instagram Login or you can enter this link:- https://www.instagram.com/accounts/login/.
Enter your valid login details and activate your account easily.
In case you forgot your password, enter the button of Forgot Password.
After that, You will be redirected into the page of reset your password with the help of your email address or valid mobile number.
Choose a convenient options and easily reset your password using a link (email address) or an OTP (mobile number)
With the help of new password to activate your deleted Instagram account.
Read more here:- https://assistsuite.com/how-to-recover-instagram-account/