Seeds in your weed isn’t a huge deal.. Especially a few immature seeds.. A lot of us have been smoking since before sinsemilla was available. Some of the old heads here will regale you with tales of bags that had more seed weight than weed weight.
As you learn your environment and grow you’ll learn to tighten up stuff like that.. Some sativas will never have amber trichomes no matter how long you wait.. I flowered my sativa for 68 days and there wasn’t a single amber trichome. When you think about the related high it makes sense.. Some indicas flower twice as fast some twice as slow.. This is where genetics and clones are huge.. you’ll learn to dial in specific plants to the day and know exactly what to expect. If I remember the math correctly every strain has 32 phenotypes.. You’ll see about 4-6 main phenos express themselves.. This means that for every strain you grow, you’ve got 32 different versions of that strain that can express. Most breeders have bred out the weak phenotypes which is why you’ll normally encounter 4-6, but this is just an example to make a point.
It sounds like it was just letting it ride too long (you’ll know they’re ready for harvest when their water consumption drops drastically..
@InTheShed I believe is who I learned this from and it’s been accurate for me) I don’t look at trichomes for harvest. I pay attention to water intake and red hairs.. When my water intake drops off and there’s more red than white hairs I know it’s time.
To go back to my first point lol.. seeds aren’t a big deal for personal use.. If you’re looking to go commercial with it dial in your setup and really focus in on growing specific genetics and phenotypes.
I recommend starting a journal.. you can get tons of tips from a huge variety of excellent cultivators with years of experience.