I definitely see some common themes in the responses above, and I will echo some of those.
I also didn't know what I was doing and didn't read anything when I first started out. My first two tanks weren't anything special as a result, and I did have losses (although I can't ever really be sure what the exact causes were).
I'll add that I wish I would have known just how much of this hobby is based on opinion and personal experience (anecdote). While those things genuinely DO matter to some degree, I've found that there are so many different ways to achieve success. Part of that is because one person's version of "success" will look really different than somebody else's.
For instance, there are some people in the hobby who are convinced that their water parameters are the most important thing. If their nitrates are 10ppm and not 2ppm, they freak out and start doing water changes. Others are ok with nitrates being 100ppm if the actual tank looks good to them (and again, what looks nice to some may not look nice to others).
All that to say it is important to define your criteria for success. Are you ok with a little algae or not? Are you most concerned with saving money or not? Do you care most about having the right parameters or having a system that looks nice regardless of parameters (or both)?
There are people in this forum that have nutrient levels WAY higher than the prescribed values and their tanks are awesome. There are people that still use undergravel filters that succeed. There are people who don't use skimmers. There are people who do. It goes on and on.
Studying and experimentation go a long way, and I think once you find your formula for success it's ok to share that with others. But what may work for you, may not work for somebody else to at least some extent (with some obvious exceptions).