Thanks for the feedback guys, and especially about the seedsman tip... At the moment, i'm waiting for seeds from a strain called kompotli, it's flowers should have less than 0.2% THC and up to 25% CBD (altough that's really the maximum, most fenotypes should have around 9%). The <0.2% THC was very important for us, since my wife does not want to be faced with the effects of THC, nor does she want to risk getting pulled over by the police and lose her drivers licence (driving under the influence of THC is illegal, you can lose your drivers licence if you get caught).
If i was informed correctly, the seeds should remain viable for 2 years in my fridge and up to 5 years in my freezer, so i hope i'm all set for the next couple of years... I have enough to plant 7 seeds/year for the next 3 years, ~50% female, 1 or 2 that die, so i should have at least 1 or 2 female plants/year, and i can put most of the flowers in the freezer for up to 5 years anyways.
seeds should be viable a lot longer than that. i've grown 5-10 year old seeds outta the fridge and failure rate is no higher than fresh seeds.
re the 0.2%, that's understandable. under normal (non pandemic) circumstances, seedsman carries lots of < 0.2% THC strains, one of which is still available now. keep them in mind in case this goes awry for you---you may need the shortened grow cycle of an autoflower. i also recommend feminized and autoflower for beginners anyway---no worrying about male vs female (or paying for males) or veg cycle vs flowering cycle. and i hate depending on one strain/brand i haven't run before, usually leads to disappointment. i've got 6 strains going, more coming when i start chopping down this year's early girls.
sourcing industrial hemp directly for infusing your own cbd drops is one other idea. it's required to have similar THC levels to what you're looking for and cooking/infusing is actually pretty easy to do. i'm not sure what the retail market is like on the other side of the atlantic.
anyway, good luck on your grow. it's such an exciting time of year.