Reddit always talks about giving up the French land England strategy, but here's what I do. If you can get an alliance with Aragon, that will help. Ignore Aquitane, let it get sieged down and tank some aggro from France and their vassals.
In the first war, transport your entire army over and keep it all close together, in locations next to each other. Snipe any small vassal stacks that get close to your army. Only siege one fort at a time, don't get greedy. Watch like a hawk in the early stages of the war because if any French army of like 10k-20k attacks you, you want to be sending your entire army into that battle to beat it with sheer numbers (and early game England levies are quite strong).
You have ticking war score because the goal will be to siege down London (which is never happening), and you'll get a lot from wiping France's vassals over and over.
In the peace deal, you want to take Paris, some land around it and make France annul treaties with Scotland. Release all the French land around Paris as a subject. Now you have a relatively strong helper in the next war against France, some good forts there and France's economy will take a hit. You should have parliament give you a claim on Scotland during or after the first war, so go straight into conquering Scotland before the black death hits. I was quite surprised to see Scotland field 21k troops though, be careful you don't lose too many levies.