I'm an avid amateur but not great with seeds.
My dad was brilliant in the garden and grew everything from seed, keeping me well stocked with bedding plants.
A funny story.
Every Spring dad's greenhouse was full of seedlings, then pricked out etc. He gave loads away to the neighbours and had a wonderful 70' long garden that was full of sweet pea, dahlias, gladioli, cosmos, all for cutting projects smaller bedding like marigolds, etc.
His greenhouse was shelved beyond capacity. Over 40 trays of seedlings watered faithfully and the greenhouse window opened daily and closed at night.
Dad was fond of a drink.
One night after a few, he went to water his seedlings which were coming along beautifully. Temporary shelves squeezed in and balanced on all sorts of tin cans. No rhyme or reason to it.
His balance wasn't perfect and he stumbled, hitting a shelf or two. Well.... When one shelf toppled they all toppled. Dad on the floor of his greenhouse and the majority of his 40 seedling boxes scattered around him. They weren't even all lightweight plastic trays. He used old wooden fish boxes as well.
Poor dad, he sobered up pretty quickly. All his work.
Next day was a busy one. All hands on deck. Everything out of the greenhouse, shelves reassembled, seedling trays set up and as many seedlings as possible saved. We did ok. He was always well overstocked anyway.
He never ventured into the greenhouse again after having a few.