So our iva is due to drop off our credit file in a week how quickly should we expect our credit score to start improving?

We were 4 years 4 months into our iva and have recentky had a baby with childcare and other baby expenses we asked for monies paid to be accepted at full and final and this was accepted we received our completion certificate last thursday thank you for your replies

Hi my husband and i had our full and final offer accepted the beginning of june and received our completion certificate by email last week my question is what now? Whats the best way to start building up our credit rating do we have to wait a certain amount of time before we can start to do this?