Im making no progress on meditation
RE: "I don't even know what I'm supposed to do during meditation" &amp; "what's causing the bliss?" - Congrats, you are very clear about what it is that you're not clear about. That's an awesome first step. 

The human mind  is an information machine. When you set a goal X and you attain X, we get "X = X" and that feels good. When you set a goal of X and you attain Y, we get "X not= Y" and that feels bad. When you don't set a clear goal (X) or you're confused about what you have (Y), there is no basis for comparison, so that feels like an ambiguous feeling, perhaps even anxiety.

In meditation, you are supposed to work on achieving perfect X=X. That's when you feel bliss. So, first of all you need to clearly define X. And then you need to work on attaining it.

In Buddhism, our X changes as we advance, from level to level. It starts pretty coarse, and then it gets more and more subtle. First we define X as "having no coarse cravings and no coarse negative emotions". Once we attain that, we redefine it as "having no worries". Once we attain that, we redefine it as "having no doubts". And so on. So on every level we achieve a state of mind that has less inner conflict and more inner harmony, and once we attain it, we congratulate ourselves on attaining it. And then we define X as "not worrying about our state of mind" - and we attain that too. So it's like a ladder.