Hi and welcome from me also
I have a black Sprint the same condition as yours, if not worst !
If you are still planning on starting working on it on July, start looking for parts and put them aside for the restoration.
A good place to look for a front bonnet and rear wheel arch repair kits is Justsuds
Then , by removing the front wings you will find that your pilars are well rusted. That is the part you'll need to pay the most attention to.
A good known place for rust on that car is also the buckets where the rear windows go in when you lower them and around the rubber of the front windshield.
Take the whole car apart and bring out the welder
However, if you have a dry place to work in , like a garage or a shed, I doubt you can keep your hands off it till July
All my best. Keep us posted with pictures, and ask for anything you might need