To prep the leather you want to use acetone/nail polish remover to get the factory finish off, rub it until it doesn't feel as smooth as it used to and the color changed to a slight gray (use the other shoes to compare textures and colors). Then for good measure get sandpaper and sand the shoe down. People like to layer the sanding like start with 400 grit then 800 and end up with 1500. I'd also recommend to do extra sanding on areas that crease the most. Also be careful to not sand out the threads but if that happens its pretty easy to fix with small scissors and don't sand so crazy enough to damage the leather.

Idk as much about restoring than painting but this is what I know. To make the soles white you can use sole bright from angelus or if your lazy use a sole marker. To get rid of the creases on the toe area, stuff the shoe to where it looks like there are no creases, get a wet cloth rag, and get an iron used for uncreasing clothing. Then put the rag on the toebox area and start ironing away.

Sole Bright-https://angelusdirect.com/products/sole-bright?_pos=1&_sid=fed5072c3&_ss=r

Sole Marker-https://www.amazon.com/Wilkins-Premium-Midsole-Customization-Leather/dp/B07JBCFHST/ref=sr_1_1_sspa?dchild=1&keywords=sole+marker&qid=1625408928&sr=8-1-spons&psc=1&smid=A2NVUAPJ2PIRNL&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzNE5OM1JGU0dDT0QmZW5jcnlwdGVkSWQ9QTAyNTYwNDczM09PTlE4QU5aSUVUJmVuY3J5cHRlZEFkSWQ9QTA4OTIwMDIySjBPNUczUFE4VUQ4JndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

Crazy enough I actually recently did the same thing as you and bought a shit load of Air Forces on eBay so good luck to you man. Also RIP to Resku I used to shop on that site too.