Tanks and DPS community consolidated such things inside guides and updated it. I don't know why must be different here. And they also answer its beginners questions.
But sorry. I learned exactly nothing from here. All I learned so far is from Reddit (that have its share of experienced players), from past guides from people outside this forum, from people in-game, is from my server's mentors (that was much more helpful for me than the people here), from self experience (making mistakes and learning from them or seeing that some sequence of skills works better for me)...
This topic alone are the greatest example of how this community looks like: some may can genuinely want to help, but some is forgetting that healing using a full-i330+ lv 70 healer inside a static full of well-geared experienced players is way easier than using a so-so equiped healer inside a PUG. And call about "uptime" when the tank is good enough to mitigate the majority of the damage (over-equipped, using its cooldowns), the DPS can melt the trash pull in a heartbeat and the co-healer is as well-equiped (with i330+) and heals very strongly even synced. With a situation like that is easy to get 17% uptime.
There are times that just healing keeps me with 100% uptime and put out Holy is a non-option (think swiftcast and presence of mind on cooldown and tank constantly taking heavy damage with regens on). And you come here saying "I don't have much uptime myself, therefore play healer is sooooooooooooooooo easy and thus you have no excuse to not play the way I want". How about play your bard, do your bard things in-game? That helps way more than your "git gud" argument.