I haven’t had much luck with onion seeds either so this year I’m trying onion sets.<<<
That will work, also plant a couple of big ones from the store and they will bloom and give you fresh seeds to try again next year, plus you will get 4 onions for each one you plant, they split into parts, LOL, don’t ask me how or why, but it happens.
One year my brother brought me about 20 pounds, that where not nice anymore, few were still fit to cook, but he said to plant them and they grew and split into more onions.
Some stuff gets nasty once it goes to seed, like lettuce gets bitter. Do onions do that or are the bulbs still good to eat?