Direct sowing onions in the North

Most of my garden is still frozen muck, but the 2 raised beds are thawed (but very cold) and dry enough to plant. I am not sure when the average last frost date is, but I'm sure it's still over a month away.
I ordered some onion and shallot seeds, and they got here yesterday. Should I plant them indoors and set them out in early May, or sow them direct in the garden?
Also, can I sow peas now or do I need to wait another 3 weeks?
I usually only grow warm-season crops, but I'm ready to get started. :-)
Thanks, Bob, in Zone 4
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