Hi Bennny, I trade for a living but have never traded a stock in my life and can therefore offer no advice on about 95% of what you've asked.
But there's one comment in your original post which still prompts a thought from me, which I think might be worth a post ...
People say back testing doesn’t work.
They do.
But be careful not to take from this loosely expressed thought something that either isn't there to be taken or isn't quite true.
What they
should say is that back-testing doesn't work
reliably in the sense that something that appears profitable on back-testing won't
necessarily be profitable, or
as profitable, with a funded account.
There are many variables involved and it's a complicated subject. As you rightly observe in your OP, beginners don't know what they don't know.
Back-testing can still be immensely valuable as a way to
exclude the 99+% of stuff that doesn't show a statistically significant positive expectancy
even on a back-test. And that can actually be a very useful and helpful way to identify the 1% or less of stuff that
can potentially work and is therefore potentially worthy of further investigation and forward-testing. In other words, back-testing - in spite of not being fully reliable - can be a pretty good way to filter out most of the crap and nonsense: it can demonstrate a lot of negatives pretty well, even though it can't demonstrate positives with certainty.
For this important reason, I'd advise you
not to dismiss it out of hand just because "people say it doesn't work".
There's probably one person on this site that can understand consistency. His tag is Maverick74, read every single one of his posts.
That's certainly good advice - I endorse that suggestion.
