Did you do Bar/Bri? It's the only study course you need. If you cannot afford the live course, buy the books off someone who's already used them.
For the essay section, check with the rules for your state to make sure, but you can probably just make shit up and keep it in IRAC.
For VA, I was told yes, make up the rules and IRAC them if you can't remember a rule. If you do make up a rule, you are better off trying to guess the common law version as VA is fairly traditional common law in a lot of substantial areas, (1st restatement for conflicts of law, etc. But yeah, IRAC, IRAC, IRAC for everything and you can pass with partial credit even if you don't know the rules. VA's essay day, last I checked, was 5 essays in one 3 hour sections, and then 4 essays and 10 short answer/fill in the blanks in the other essay section. All 9 essays are issue spotter essays, none of that open up a gigantic file and read through it stuff and write up that other states have.
The entire bar exam for my state was essays. They were pretty in depth, but the same approach applied- stumped on an issue, make up a rule and IRAC like crazy.