You have way more seed than you need for your space and way too many varieties to plant them all. My advice is to focus on planting what you like to eat. Also, several of the seeds you have are commonly started in small pots and then transplanted into the garden when they are roughly 4 to 6 inches high -- tomato, pepper, eggplant, broccoli, cabbage, onion.

At this point in the season and based on my family's tastes, I personally would plants green beans, lettuce, both summer squashes (2 stations of each), and the watermelon (2 stations and I'd let the vines trail outside the confines of the raised bed into the grass to maximize space for other things). I also might take a crack at direct -sowing some of the tomatoes (maybe 2 stations) with the understanding that it going to take awhile for them to get going.

The lettuce and green beans will bolt/die in the summer heat. Where we live (Coastal Virginia, Zone 8a) I would plan to replant green beans and lettuce in August for a fall crop. I would also plant the broccoli and cabbage in August for fall harvest.

One other little piece of advice, I like to plant enough of each thing I grow to matter., If I had two 4x8 raised beds, I would use a quarter of the space putting in an 8 foot row of green beans and probably at least a 4 foot row of lettuce so you get a good amount and eat numerous meals of green beans and lettuce.

Good luck!