Few odd Questions Any help appreciated (pond/water couorse building/sturgeon) (UK)

I too am very new to all of this. I read a very interesting newbie article
once which said "Figure out how many fish your pond can support - then start
with 1/10th that." Also read "Pond keeping is not a science it is an art".
Ponding is not a formula. There are just too many variables which can
frequently change making each pond it's own little learning experience. You
will make mistakes - that's a given. Start slowly and your mistakes wont
cost you nearly as much in time, money and satisfaction. The bigger the
cushion to start the less the bruise in learning. Get to know your pond,
your filter, your fish, your unthought of problems. Quarantine all new fish
and plants before adding new problems to your pond. Don't start with
feeders. These things and more will help to keep new problems from becoming
a string of disasters. I say this having not done most of these things, but
I sure would do it differently if I had a second chance. Things will be
just so much more controlled and happy for everybody and everything. I
suspect there are some 'fast track' people who could also add their
disasters - but they're no longer ponders. Yes I think the 1000+ rule is
probably overstated.
I have already seen several EXPERIENCED ponders who have broken it. But if
you are soliciting advice and INEXPERIENCED this is probably a very good
rule. Start slowly and someday you will probably figure out how to 'break
the rules' safely in your own pond with your specific variables, or figured
out why you shouldnt. Or if you're like many in this group you'll have a
bigger pond and altogether different issues.

BTW - I dont know a thing about sturgeon. But my guess is, if they are
anything like comets you are on the way to your first three mistakes.
Filter not cylced, they got bugs, etc.

Bill Brister
Austin, Texas