Good advice here is about the raised beds for a garden this small.
The dirt is absolutely another story.
99% of "gardening advice" I've gotten in the past fifteen years is from people with no firm understanding of what they're blathering about. They get good/bad yields and are COMPLETELY in the dark about the reason, which they misattribute.
I wasted untold man-months, sweat and money "building up my soil with organic matter" which in the end did nothing but create a pretty fatal imbalance in my soil for most vegetables.
What I know:
Test the soil or have it tested professionally and adjust accordingly.
Raised beds are easier to maintain.
Homegrown vegetables are worth it, especially heirloom tomatoes and sweet corn.
Good luck, home gardening is always a laborious crapshoot.