New Player Experience?

My main confusion is getting rewards and not knowing where they're coming from. I don't see any list of reward history. Like what I got and where it came from.

There's a section for level rewards that shows the first 10 levels, and exactly what you get each level. There's also a daily reward. These make sense.

What doesn't make sense is Beginner Journey Mission. It says there's 8. It only shows the current mission and the reward. But I can't see previous missions.

Also, aside from rewards I received from those level and daily mentioned above, I also received unknown rewards after playing my very first Swiftplay game. 5,050 Blue Essence - not sure if any of that was from the Beginner Journey Mission. And something popped up saying "Get In Game" - 2 missions complete, 3 added, - I got a Darius permanent card. After my second game, I got the same type of permanent card for for Brand. I didn't see what the thing said when it popped up, and disappeared. I don't understand what these are.

So I guess I should just keep collecting these cards for my 20 champion requirement. Also not sure which chest to open if I ever get a key.