However you have meet the minimum criteria for Australia immigration. The 60 points are the minimum score you need to score for Immigration process and 7 bands of IELTS is sufficient to immigrate Australia. You fall under the category of Skilled Immigration visa.
We can not tell the actual time you get the invitation and it mostly depends on the number of application received and the demand of your profile.
You can take idea about, In how many months can one get Australia PR with 65 points overall with IT experience?